jsPerf.app is an online JavaScript performance benchmark test runner & jsperf.com mirror. It is a complete rewrite in homage to the once excellent jsperf.com now with hopefully a more modern & maintainable codebase.

jsperf.com URLs are mirrored at the same path, e.g:

https://jsperf.com/negative-modulo/2

Can be accessed at:

https://jsperf.app/negative-modulo/2

Latest Benchmarks

Strip md formatting Published on July 9, 2025 [3 tests, 1 revision]
Test Published on July 9, 2025 [2 tests, 2 revisions]
unlock B and W Published on July 8, 2025 [4 tests, 3 revisions]
Freezing vs Cloning Published on July 8, 2025 [3 tests, 1 revision]
dot access vs assignment Published on July 8, 2025 [2 tests, 1 revision]
Mutating vs not-mutating Published on July 8, 2025 [2 tests, 1 revision]
Math.random() vs crypto.getRandomValues() for UInt32 Published on July 8, 2025 [3 tests, 2 revisions]
Object.keys vs Object.getOwnPropertyNames Published on July 8, 2025 [2 tests, 1 revision]
await vs not Published on July 7, 2025 [3 tests, 3 revisions]
Closure price Published on July 7, 2025 [2 tests, 2 revisions]
Trailing slash removal Published on July 7, 2025 [4 tests, 1 revision]
parseFloat vs replace Published on July 5, 2025 [2 tests, 1 revision]
ES6 String Literals vs. String Concatenation Published on July 4, 2025 [3 tests, 9 revisions]
array Published on July 4, 2025 [5 tests, 2 revisions]
Filling the array Published on July 4, 2025 [3 tests, 2 revisions]
Access Public vs. Private Published on July 3, 2025 [4 tests, 1 revision]
ms rounding Published on July 3, 2025 [3 tests, 1 revision]
ES6 Map vs Object Get Published on July 3, 2025 [4 tests, 30 revisions]
regex compile Published on July 1, 2025 [2 tests, 1 revision]
Prototype vs. class Published on July 1, 2025 [2 tests, 3 revisions]
Shuffle Published on July 1, 2025 [2 tests, 2 revisions]
Cloning Objects Published on July 1, 2025 [5 tests, 4 revisions]
decycle vs cloneWithoutCircular Published on June 30, 2025 [2 tests, 1 revision]
Test cachingu Published on June 30, 2025 [2 tests, 1 revision]
Array init or not Published on June 27, 2025 [2 tests, 1 revision]
Expression evaluator performance comparison Published on June 27, 2025 [5 tests, 3 revisions]
spread vs concat Published on June 26, 2025 [2 tests, 1 revision]
typedarray-vs-ordinary-array Published on June 26, 2025 [2 tests, 1 revision]
Normalized vs normal update Published on June 25, 2025 [3 tests, 1 revision]
Set.has vs Array.includes performance for short sizes Published on June 24, 2025 [4 tests, 1 revision]
Reduce vs for Published on June 23, 2025 [3 tests, 3 revisions]
Тест список vs массив Published on June 23, 2025 [6 tests, 1 revision]
Instruction Decode Published on June 23, 2025 [3 tests, 3 revisions]
Iterator vs Array Published on June 23, 2025 [2 tests, 1 revision]
x Published on June 22, 2025 [5 tests, 1 revision]
reduce Published on June 21, 2025 [3 tests, 1 revision]
delete vs undefined Published on June 20, 2025 [2 tests, 1 revision]
Console.log Published on June 20, 2025 [3 tests, 5 revisions]
switch vs if-else Published on June 19, 2025 [3 tests, 2 revisions]
Delete vs. Spread Extract Published on June 19, 2025 [2 tests, 1 revision]
new array vs spread operator Published on June 19, 2025 [3 tests, 5 revisions]
Three Loops vs. One Triple Loop Published on June 19, 2025 [2 tests, 1 revision]
Two Loops vs. One Double Loop Published on June 19, 2025 [2 tests, 1 revision]
perf Published on June 19, 2025 [2 tests, 1 revision]
includes vs indexOf Published on June 19, 2025 [2 tests, 1 revision]
Falsy vs !== undefined Published on June 18, 2025 [2 tests, 1 revision]
DomParser Published on June 18, 2025 [4 tests, 2 revisions]
deDupe Published on June 18, 2025 [4 tests, 2 revisions]
.entries, for of, and .forEach Published on June 18, 2025 [2 tests, 1 revision]
for in vs Object.keys Published on June 18, 2025 [3 tests, 2 revisions]
Int8 divide by 2 Published on June 17, 2025 [3 tests, 1 revision]
Function call vs assignment Published on June 17, 2025 [2 tests, 1 revision]
Set vs indexOf for safe insertion Published on June 17, 2025 [2 tests, 1 revision]
indexOf with splice vs filter Published on June 17, 2025 [2 tests, 1 revision]
Canvas draw image comparison Published on June 17, 2025 [3 tests, 1 revision]
Object.is vs Symbol comparison Published on June 17, 2025 [2 tests, 2 revisions]
Finding unique keys across the list of records Published on June 16, 2025 [5 tests, 5 revisions]
array indexing vs charAt Published on June 16, 2025 [2 tests, 1 revision]
fastest way to find a vowel in a string Published on June 14, 2025 [11 tests, 3 revisions]
last index check Published on June 14, 2025 [6 tests, 1 revision]
TEST Published on June 13, 2025 [2 tests, 1 revision]
Summing with filters or counts Published on June 13, 2025 [2 tests, 1 revision]
Approx Equals Vectors Published on June 13, 2025 [6 tests, 1 revision]
Deterministic - reduce vs filter Published on June 11, 2025 [2 tests, 6 revisions]
Single vs Multiple regex Published on June 11, 2025 [2 tests, 1 revision]
remove all content from an element Published on June 11, 2025 [21 tests, 68 revisions]
for in vs for of Published on June 11, 2025 [3 tests, 1 revision]
New vs Del Published on June 11, 2025 [2 tests, 2 revisions]
number to string Published on June 11, 2025 [5 tests, 2 revisions]
Calculate bytes Published on June 10, 2025 [2 tests, 1 revision]
Split String into array on phrase Published on June 9, 2025 [3 tests, 1 revision]
Set.prototype.add vs Array.prototype.push performance Published on June 9, 2025 [2 tests, 1 revision]
object inject Published on June 9, 2025 [2 tests, 2 revisions]
Add existing Set value with and without has() Published on June 9, 2025 [2 tests, 1 revision]
json parse vs eval Published on June 7, 2025 [2 tests, 2 revisions]
min Published on June 7, 2025 [4 tests, 1 revision]
forward backward loop with DATA Published on June 6, 2025 [2 tests, 1 revision]
String replacement methods Published on June 6, 2025 [5 tests, 2 revisions]
Destructure vs Slice Published on June 6, 2025 [2 tests, 1 revision]
for, for-of, forEach Published on June 6, 2025 [3 tests, 1 revision]
querySelector Published on June 6, 2025 [2 tests, 1 revision]
RegExp vs Arr Published on June 5, 2025 [3 tests, 1 revision]
FLIP layout-animation techniques Published on June 5, 2025 [15 tests, 3 revisions]
ArrayCopy Published on June 4, 2025 [2 tests, 1 revision]
map vs spread Published on June 4, 2025 [4 tests, 4 revisions]
Squeeze element into the middle of an array Published on June 4, 2025 [4 tests, 3 revisions]
flatMap vs filter and map Published on June 4, 2025 [8 tests, 8 revisions]
array replacement vs emplace Published on June 2, 2025 [4 tests, 1 revision]
SMART PARK SYSTEM Published on June 1, 2025 [2 tests, 1 revision]
array vs linked list (last element) Published on May 30, 2025 [4 tests, 2 revisions]
array push vs array set Published on May 30, 2025 [2 tests, 2 revisions]
String startsWith vs regex Published on May 30, 2025 [3 tests, 1 revision]
property static vs symbol access speed Published on May 30, 2025 [3 tests, 3 revisions]
Array iteration direction Published on May 30, 2025 [2 tests, 1 revision]
条件判断与循环性能比较 Published on May 30, 2025 [2 tests, 1 revision]
Actions Published on May 29, 2025 [5 tests, 3 revisions]
creators Published on May 29, 2025 [10 tests, 14 revisions]
Multiple function parameters vs parameter object Published on May 28, 2025 [2 tests, 1 revision]
Tokenize perfomance comparation Published on May 28, 2025 [2 tests, 1 revision]
canvas: batch draws Published on May 28, 2025 [6 tests, 1 revision]
Matrix Concat Published on May 27, 2025 [2 tests, 1 revision]
for vs while loops, positive and negative Published on May 27, 2025 [5 tests, 3 revisions]
JSON.parse(JSON.stringify()) vs. cloneDeep vs. custom clone Published on May 27, 2025 [3 tests, 2 revisions]
_.filter vs .filter Published on May 26, 2025 [2 tests, 3 revisions]
_.any vs .some Published on May 26, 2025 [2 tests, 2 revisions]
_.contains vs .includes Published on May 26, 2025 [2 tests, 2 revisions]
_.each vs .forEach Published on May 26, 2025 [2 tests, 2 revisions]
_.map vs .map Published on May 26, 2025 [2 tests, 2 revisions]
_.without vs .filter Published on May 26, 2025 [2 tests, 2 revisions]
Reduce vs for Published on May 26, 2025 [3 tests, 4 revisions]
prefix string Published on May 26, 2025 [6 tests, 1 revision]
strict parseInt vs strict toString vs loose equality Published on May 24, 2025 [3 tests, 1 revision]
Test if Array popping without reducing array size helps anything Published on May 23, 2025 [3 tests, 1 revision]
Text.data vs. Element.textContent - long strings Published on May 23, 2025 [2 tests, 1 revision]
Text.data vs. Element.textContent - short strings Published on May 23, 2025 [2 tests, 1 revision]
Distance Published on May 23, 2025 [4 tests, 2 revisions]
FilterChain Published on May 22, 2025 [2 tests, 1 revision]
bind vs. call vs. wrapper Published on May 22, 2025 [3 tests, 2 revisions]
RegEx Split vs Boolean Filter Published on May 22, 2025 [2 tests, 1 revision]
Backticks / `+` / `.concat(…)` Published on May 22, 2025 [3 tests, 1 revision]
Array.push vs index Published on May 22, 2025 [2 tests, 4 revisions]
Concat vs Push Published on May 22, 2025 [3 tests, 3 revisions]
Push vs Spread2 Published on May 21, 2025 [3 tests, 2 revisions]
Arrow functions Published on May 21, 2025 [2 tests, 1 revision]
Test for 0: Boolean invert vs equals Published on May 21, 2025 [2 tests, 1 revision]
squaredDistance Published on May 21, 2025 [4 tests, 1 revision]
Array extending: push vs concat Published on May 21, 2025 [5 tests, 1 revision]
alignSeries Published on May 20, 2025 [4 tests, 2 revisions]
moment.isValid vs regex date string validation Published on May 20, 2025 [8 tests, 1 revision]
test Published on May 20, 2025 [2 tests, 1 revision]
Pattern Matching Performance Published on May 19, 2025 [4 tests, 1 revision]
Clear array Published on May 19, 2025 [3 tests, 1 revision]
hashmap vs class Published on May 19, 2025 [3 tests, 1 revision]
classList.contains vs matches vs some Published on May 17, 2025 [3 tests, 1 revision]
Flatten css classes args Published on May 17, 2025 [3 tests, 1 revision]
nth array element Published on May 17, 2025 [3 tests, 1 revision]
Last array element Published on May 17, 2025 [3 tests, 1 revision]
First array element Published on May 17, 2025 [5 tests, 1 revision]
callback with or without context Published on May 17, 2025 [3 tests, 1 revision]
Node loop Published on May 17, 2025 [3 tests, 1 revision]
Node loop Published on May 17, 2025 [3 tests, 2 revisions]
Node loop Published on May 17, 2025 [3 tests, 1 revision]
Nullish equality check Published on May 16, 2025 [4 tests, 1 revision]
Simple async test Published on May 16, 2025 [2 tests, 3 revisions]
regexp vs indexOf Published on May 16, 2025 [5 tests, 1 revision]
Lodash flatten vs Array.flat vs reduce/concat (module import) Published on May 16, 2025 [3 tests, 2 revisions]
regexp.test vs string.match Published on May 15, 2025 [7 tests, 1 revision]
"Date.now()" vs "+new Date()" vs "new Date().getTime()" Published on May 15, 2025 [2 tests, 11 revisions]
Template literals in logs Published on May 15, 2025 [2 tests, 1 revision]
Random Published on May 15, 2025 [2 tests, 1 revision]
Split vs Match vs Replace Published on May 14, 2025 [2 tests, 1 revision]
underscore_mod-no-native Published on May 14, 2025 [12 tests, 3 revisions]
Foo Published on May 14, 2025 [2 tests, 1 revision]
spread vs assign Published on May 13, 2025 [2 tests, 2 revisions]
Simple generator vs custom iterator Published on May 13, 2025 [2 tests, 2 revisions]
Hypot vs Sqrt Published on May 13, 2025 [6 tests, 4 revisions]
Sort map entries with or without explicit comparison? Published on May 13, 2025 [2 tests, 1 revision]
test Published on May 13, 2025 [2 tests, 1 revision]
Collect children Published on May 12, 2025 [2 tests, 1 revision]
math.sqrt vs none Published on May 12, 2025 [4 tests, 1 revision]
Sums of Squares Published on May 11, 2025 [4 tests, 1 revision]
test Published on May 11, 2025 [2 tests, 1 revision]
Filter vs Set removal Published on May 11, 2025 [2 tests, 1 revision]
Always write vs conditional write Published on May 11, 2025 [2 tests, 1 revision]
map set fn vs class Published on May 10, 2025 [2 tests, 2 revisions]
sample event converter Published on May 9, 2025 [2 tests, 2 revisions]
Property Getter / Setter Techniques Published on May 9, 2025 [13 tests, 2 revisions]
find Published on May 9, 2025 [2 tests, 1 revision]
Promise then(resolve, reject) vs. then(resolve).catch(reject) Published on May 9, 2025 [4 tests, 1 revision]
innerText VS textContent Published on May 9, 2025 [2 tests, 2 revisions]
Throwing vs Branching Published on May 8, 2025 [4 tests, 3 revisions]
Destructuring vs index access Published on May 8, 2025 [2 tests, 1 revision]
Drill down in object Published on May 8, 2025 [5 tests, 2 revisions]
Set.has vs Array.include Published on May 7, 2025 [4 tests, 3 revisions]
future_ms Published on May 7, 2025 [2 tests, 1 revision]
RegExp IPv4 parsing vs. string parsing Published on May 6, 2025 [3 tests, 3 revisions]
Static vs new Arrays Published on May 6, 2025 [2 tests, 1 revision]
traditional castArray vs [].flat() Published on May 6, 2025 [3 tests, 3 revisions]
Map vs. Object Map Published on May 6, 2025 [3 tests, 3 revisions]
a^n vs n times of a Published on May 6, 2025 [2 tests, 2 revisions]
O(n) vs O(3n) Published on May 6, 2025 [2 tests, 1 revision]
addEventListener vs WMEL Published on May 6, 2025 [2 tests, 1 revision]
Example perf on smaller arrays Published on May 5, 2025 [2 tests, 3 revisions]
Sorting higlighted items in array Published on May 5, 2025 [2 tests, 1 revision]
Does transforming the entire response make a significant difference? Published on May 5, 2025 [4 tests, 3 revisions]
Number vs BigInt bitflag retrieve Published on May 2, 2025 [2 tests, 2 revisions]
Simple process vs simple function Published on May 2, 2025 [2 tests, 1 revision]
contry already uppercase Published on May 2, 2025 [7 tests, 6 revisions]
Split long string into hunks and rejoin with separator Published on May 1, 2025 [2 tests, 1 revision]
test splitByFirstComma Published on May 1, 2025 [9 tests, 2 revisions]
replaceAllvsMap Published on May 1, 2025 [2 tests, 1 revision]
Compare dates Published on April 30, 2025 [7 tests, 2 revisions]
obj props Published on April 30, 2025 [5 tests, 3 revisions]
Vector Published on April 29, 2025 [2 tests, 3 revisions]
Map 성능비교 테스트 Published on April 29, 2025 [2 tests, 1 revision]
Find vs Map Published on April 29, 2025 [3 tests, 2 revisions]
concat vs flat vs isArray Published on April 29, 2025 [3 tests, 1 revision]
SHA256 Published on April 29, 2025 [3 tests, 4 revisions]
Math.log10 vs Math.log / Math.LN10 vs (-Math.log * -0.4342944819032518) Published on April 28, 2025 [3 tests, 2 revisions]
For vs ForEach vs Map Published on April 27, 2025 [4 tests, 3 revisions]
Fetching from favorites object store Published on April 25, 2025 [2 tests, 3 revisions]
Regex vs DOMParser Published on April 25, 2025 [2 tests, 1 revision]
Local Storage vs Session Storage Published on April 24, 2025 [2 tests, 1 revision]
Destructure vs overwrite Published on April 24, 2025 [2 tests, 1 revision]
A Published on April 24, 2025 [2 tests, 1 revision]
Set.has() vs Array.includes() Published on April 24, 2025 [2 tests, 6 revisions]
uniquify Published on April 23, 2025 [2 tests, 1 revision]
replaceAll vs. split Published on April 23, 2025 [2 tests, 1 revision]
Traversal perftest Published on April 23, 2025 [5 tests, 4 revisions]
Random strings joined with += and .join() Published on April 23, 2025 [2 tests, 2 revisions]
moo tool values Published on April 22, 2025 [2 tests, 1 revision]
If Published on April 22, 2025 [2 tests, 1 revision]
append vs appendChild Published on April 22, 2025 [2 tests, 3 revisions]
array indexOf vs array includes vs regex match Published on April 21, 2025 [3 tests, 2 revisions]
Object vs Map Mutation Published on April 21, 2025 [2 tests, 2 revisions]
testtt Published on April 21, 2025 [3 tests, 1 revision]
Static variables in class vs in closures Published on April 20, 2025 [2 tests, 1 revision]
using innerHTML or appendChild Published on April 20, 2025 [2 tests, 1 revision]
substr vs split Published on April 20, 2025 [2 tests, 1 revision]
void 0 vs null Published on April 20, 2025 [7 tests, 3 revisions]
test JSON.parse vs string splitting Published on April 18, 2025 [2 tests, 1 revision]
TextDecoder vs String.fromCharCode Published on April 18, 2025 [7 tests, 1 revision]
mc_create2Darray_10Kx100 Published on April 18, 2025 [14 tests, 1 revision]
mc_create2Darray_100x10K Published on April 18, 2025 [14 tests, 1 revision]
mc_create2Darray_1Kx1K Published on April 18, 2025 [14 tests, 1 revision]
mc_create2Darray_100x100 Published on April 18, 2025 [14 tests, 1 revision]
mc_create2Darray_10x10 Published on April 18, 2025 [14 tests, 1 revision]
Empty fn cost Published on April 18, 2025 [2 tests, 1 revision]
concat-test Published on April 17, 2025 [9 tests, 3 revisions]
instanceof Function vs typeof === "function" Published on April 17, 2025 [2 tests, 3 revisions]
switch vs bastardized python switch Published on April 17, 2025 [2 tests, 1 revision]
Shallow copy of an array Published on April 17, 2025 [3 tests, 1 revision]
string length via Object.keys Published on April 17, 2025 [2 tests, 1 revision]
Conditional set variable vs unconditional set variable Published on April 16, 2025 [2 tests, 1 revision]
matrix vs object Published on April 16, 2025 [6 tests, 2 revisions]
Testing article filtering Published on April 16, 2025 [2 tests, 1 revision]
array.values.map vs array.map Published on April 16, 2025 [5 tests, 3 revisions]
forEach vs forEach.values vs for loop Published on April 16, 2025 [4 tests, 1 revision]
in-hasWon-hasOwnProperty Published on April 16, 2025 [3 tests, 1 revision]
foreach vs map Published on April 16, 2025 [2 tests, 2 revisions]
javascript values vs array method Published on April 16, 2025 [10 tests, 1 revision]
JSON test Published on April 15, 2025 [2 tests, 1 revision]
TypedArray copy Published on April 15, 2025 [3 tests, 1 revision]
parseInt vs Number Published on April 15, 2025 [2 tests, 1 revision]
mc_convertArray2Dto1D Published on April 15, 2025 [16 tests, 1 revision]
Execute queue: arrow function v. apply Published on April 15, 2025 [3 tests, 1 revision]
Getter vs Raw Access Published on April 14, 2025 [2 tests, 2 revisions]
Regex Pattern Test Published on April 14, 2025 [3 tests, 3 revisions]
Get - class vs object Published on April 14, 2025 [2 tests, 2 revisions]
mc_randomSplit_10M_1M Published on April 13, 2025 [7 tests, 1 revision]
mc_randomSplit_10M_100K Published on April 13, 2025 [7 tests, 1 revision]
mc_randomSplit_10M_10K Published on April 13, 2025 [7 tests, 1 revision]
mc_randomSplit_10M_1K Published on April 13, 2025 [7 tests, 1 revision]
mc_randomSplit_10M_10 Published on April 13, 2025 [7 tests, 2 revisions]
Loop performance Published on April 11, 2025 [2 tests, 10 revisions]
Number Prototype vs declared function Published on April 11, 2025 [2 tests, 22 revisions]
bbb Published on April 11, 2025 [2 tests, 1 revision]
a Published on April 11, 2025 [2 tests, 1 revision]
Fastest way to check first character of a string Published on April 10, 2025 [3 tests, 2 revisions]
starts with http Published on April 10, 2025 [2 tests, 1 revision]
Array VS Iterrator Published on April 10, 2025 [3 tests, 9 revisions]
uintarrays Published on April 9, 2025 [5 tests, 6 revisions]
String interning Published on April 9, 2025 [3 tests, 2 revisions]
Testing different ways to compare Set equality Published on April 8, 2025 [5 tests, 1 revision]
Performance of methods to insert item at start of array Published on April 8, 2025 [4 tests, 2 revisions]
flatMap vs concat filter map Published on April 8, 2025 [2 tests, 2 revisions]
flatMap vs map + filter Published on April 8, 2025 [3 tests, 1 revision]
aa Published on April 8, 2025 [2 tests, 1 revision]
math float32 vs number Published on April 7, 2025 [4 tests, 4 revisions]
querySelector performance Published on April 4, 2025 [3 tests, 1 revision]
test Published on April 4, 2025 [2 tests, 1 revision]
a faster way to delete an element Published on April 4, 2025 [4 tests, 2 revisions]
Array destructuring vs indexed access Published on April 4, 2025 [2 tests, 1 revision]
CSS Perf Test Published on April 3, 2025 [5 tests, 4 revisions]
Abort loop speed test Published on April 3, 2025 [3 tests, 2 revisions]
zero padding test Published on April 3, 2025 [3 tests, 1 revision]
String building Published on April 3, 2025 [3 tests, 2 revisions]
wrewerwe Published on April 3, 2025 [2 tests, 1 revision]
object methods count Published on April 3, 2025 [3 tests, 1 revision]
Duplicate key access + key access vs Single key access + key access Published on April 2, 2025 [2 tests, 1 revision]
jquery v js perf Published on April 2, 2025 [4 tests, 1 revision]
mc_moveZeroesToEnd_1K Published on April 2, 2025 [10 tests, 3 revisions]
Parameter destructuring vs direct property access Published on April 2, 2025 [2 tests, 1 revision]
mc_arrMoveZeroesToEnd_1K Published on April 2, 2025 [9 tests, 1 revision]
Array.concat vs. spread Published on April 2, 2025 [2 tests, 1 revision]
Switch vs Map Lookup Published on March 31, 2025 [2 tests, 1 revision]
Spread and map vs Array.from Published on March 31, 2025 [2 tests, 1 revision]
Spare array iteration Published on March 30, 2025 [2 tests, 1 revision]
Includes vs has Published on March 28, 2025 [6 tests, 2 revisions]
Array Conversions Published on March 28, 2025 [2 tests, 1 revision]
querySelector vs getElementById Published on March 28, 2025 [2 tests, 2 revisions]
Object.assign vs direct object access - Styles Published on March 28, 2025 [2 tests, 2 revisions]
If vs Cached Published on March 28, 2025 [2 tests, 4 revisions]
Deep Equal vs JSON.stringify Published on March 28, 2025 [6 tests, 1 revision]
Partial Sort Published on March 27, 2025 [4 tests, 2 revisions]
Construct Intl perf Published on March 26, 2025 [2 tests, 2 revisions]
instanceof vs. typeof Published on March 26, 2025 [2 tests, 1 revision]
Set vs Array.includes Published on March 26, 2025 [6 tests, 1 revision]
Custom DOM Property Published on March 26, 2025 [2 tests, 1 revision]
Array Spread vs Concat Published on March 25, 2025 [2 tests, 4 revisions]
querySelector vs getElementById Published on March 25, 2025 [2 tests, 1 revision]
array length Published on March 25, 2025 [2 tests, 1 revision]
Using object method Published on March 25, 2025 [3 tests, 1 revision]
JS classes vs plain objects vs factory vs Object.create Published on March 25, 2025 [6 tests, 2 revisions]
Date Parsing Published on March 25, 2025 [2 tests, 1 revision]
JS Perf for of vs concat Published on March 24, 2025 [2 tests, 2 revisions]
clearTimeout undefined cost Published on March 24, 2025 [2 tests, 4 revisions]
isInteger Test Published on March 24, 2025 [2 tests, 1 revision]
decode Published on March 24, 2025 [3 tests, 2 revisions]
Async setTimeout Published on March 24, 2025 [2 tests, 1 revision]
10a63377c7b9a139a5edffd8bf030fec_use Published on March 24, 2025 [3 tests, 7 revisions]
[RM] _template vs eval vs sval Published on March 24, 2025 [3 tests, 4 revisions]
Number formatter Published on March 24, 2025 [2 tests, 1 revision]
ES5 vs ESNext await Published on March 24, 2025 [3 tests, 1 revision]
conditions in loops vs none Published on March 22, 2025 [2 tests, 2 revisions]
Parse Query String Published on March 22, 2025 [2 tests, 1 revision]
trucating decimals on numeric style properties Published on March 21, 2025 [5 tests, 2 revisions]
Splitting on newlines - regex vs string Published on March 21, 2025 [3 tests, 1 revision]
10a63377c7b9a139a5edffd8bf030fec Published on March 21, 2025 [3 tests, 6 revisions]
htmlspecialchars Published on March 21, 2025 [6 tests, 1 revision]
parse vtt Published on March 21, 2025 [3 tests, 3 revisions]
Strength Reduction Published on March 21, 2025 [2 tests, 1 revision]
Inlining Published on March 20, 2025 [2 tests, 2 revisions]
Checking to see if a key is valid using an array or set Published on March 20, 2025 [6 tests, 2 revisions]
String Replace Published on March 20, 2025 [2 tests, 1 revision]
slice() regex vs manually Published on March 20, 2025 [5 tests, 3 revisions]
IndexOf Published on March 20, 2025 [9 tests, 2 revisions]
set vs list Published on March 19, 2025 [2 tests, 1 revision]
Testing large amount of numbers Published on March 19, 2025 [4 tests, 3 revisions]
js string search performance Published on March 19, 2025 [7 tests, 1 revision]
sc vs encode vs ssc Published on March 18, 2025 [3 tests, 1 revision]
String match Published on March 18, 2025 [3 tests, 1 revision]
For vs Foreach Published on March 18, 2025 [3 tests, 2 revisions]
FlatMapSet VS MapReduce Published on March 18, 2025 [3 tests, 3 revisions]
Crypto.getRandomValues vs Math.random speed Published on March 18, 2025 [2 tests, 2 revisions]
search Published on March 18, 2025 [3 tests, 1 revision]
mc_convertingString2Array Published on March 17, 2025 [10 tests, 1 revision]
precompile Published on March 17, 2025 [2 tests, 1 revision]
Closure vs ES6 class Published on March 17, 2025 [2 tests, 1 revision]
Parse vs precheck Published on March 17, 2025 [3 tests, 4 revisions]
Data object to class instance Published on March 17, 2025 [2 tests, 2 revisions]
Data array to class instance Published on March 17, 2025 [3 tests, 1 revision]
Find unique array values Published on March 17, 2025 [5 tests, 7 revisions]
fetch in loop, fetch once Published on March 17, 2025 [2 tests, 1 revision]
[RM] _template vs eval vs sval simple expression Published on March 17, 2025 [3 tests, 1 revision]
joning 2 arrays Published on March 17, 2025 [2 tests, 1 revision]
create new array or change param array Published on March 17, 2025 [2 tests, 1 revision]
[RP] _template vs eval vs sval Published on March 17, 2025 [3 tests, 4 revisions]
at method vs bracket notation Published on March 17, 2025 [2 tests, 1 revision]
summarizators Published on March 16, 2025 [4 tests, 3 revisions]
Iterable spread syntax vs Array.from() (Maps) Published on March 16, 2025 [2 tests, 2 revisions]
Create empty object without prototype Published on March 16, 2025 [3 tests, 2 revisions]
Shadow value in loop or no Published on March 15, 2025 [2 tests, 1 revision]
Update list of variables vs single object Published on March 15, 2025 [3 tests, 1 revision]
Update variable in outer scope vs function argument Published on March 15, 2025 [2 tests, 1 revision]
Local variable vs outer scope variable Published on March 15, 2025 [2 tests, 1 revision]
Object vs array update Published on March 15, 2025 [2 tests, 1 revision]
Recreate object vs update properties Published on March 15, 2025 [2 tests, 1 revision]
forEach和for性能对比 Published on March 14, 2025 [2 tests, 1 revision]
Switch Statement vs. Dictionary Object: Functions Edition Published on March 14, 2025 [2 tests, 1 revision]
declarative vs imperative Published on March 13, 2025 [5 tests, 5 revisions]
Array join vs JSON stringify Published on March 13, 2025 [2 tests, 2 revisions]
Sort a value first: sort vs filter Published on March 12, 2025 [2 tests, 1 revision]
find vs some Published on March 12, 2025 [2 tests, 1 revision]
Iter Published on March 12, 2025 [3 tests, 1 revision]
Error stack access Published on March 11, 2025 [3 tests, 1 revision]
map vs find Published on March 11, 2025 [2 tests, 1 revision]
Loop array with idx Published on March 11, 2025 [5 tests, 1 revision]
cid parse Published on March 11, 2025 [2 tests, 5 revisions]
dates Published on March 11, 2025 [2 tests, 1 revision]
Throwing vs. Branching: Happy Path Published on March 10, 2025 [2 tests, 1 revision]
Throwing vs. Branching: Unhappy Path Published on March 10, 2025 [2 tests, 1 revision]
parse int Published on March 10, 2025 [3 tests, 1 revision]
dispatch status test Published on March 10, 2025 [2 tests, 2 revisions]
obj vs arr access Published on March 10, 2025 [2 tests, 1 revision]
Spread empty object vs. undefined Published on March 10, 2025 [2 tests, 1 revision]
getElementById Published on March 10, 2025 [2 tests, 1 revision]
hasTrailingSlash Published on March 9, 2025 [6 tests, 1 revision]
Coords storage Published on March 7, 2025 [5 tests, 1 revision]
testest Published on March 7, 2025 [2 tests, 1 revision]
Array of promises Published on March 7, 2025 [2 tests, 1 revision]
perf Published on March 7, 2025 [2 tests, 1 revision]
Union type Published on March 7, 2025 [7 tests, 1 revision]
High read object lookup Published on March 6, 2025 [2 tests, 1 revision]
High-frequency large lookup data Published on March 6, 2025 [3 tests, 2 revisions]
array vs Published on March 6, 2025 [3 tests, 1 revision]
filter vs forEach + push Published on March 6, 2025 [4 tests, 3 revisions]
Array push vs Array map Published on March 6, 2025 [2 tests, 4 revisions]
parseInt Published on March 6, 2025 [2 tests, 1 revision]
Data access Published on March 5, 2025 [5 tests, 2 revisions]
Object.groupBy vs forEach Published on March 5, 2025 [2 tests, 1 revision]
Object lookup performance Published on March 5, 2025 [2 tests, 2 revisions]
array access vs simple variable Published on March 5, 2025 [9 tests, 2 revisions]
Null-guard vs null-greater-than comparison Published on March 5, 2025 [4 tests, 1 revision]
Structure to represent Vectors Published on March 5, 2025 [10 tests, 1 revision]
New Set vs. add Published on March 4, 2025 [2 tests, 1 revision]
Object lookup vs Object in Published on March 4, 2025 [2 tests, 3 revisions]
Param reassign Published on March 4, 2025 [4 tests, 2 revisions]
ES6 String Literals vs. Normal String (no variable) Published on March 4, 2025 [3 tests, 1 revision]
Switch vs if vs lookup object Published on March 3, 2025 [5 tests, 1 revision]
TEST Published on March 3, 2025 [2 tests, 1 revision]
JS array comparison Published on March 3, 2025 [3 tests, 1 revision]
String template vs cast for number Published on March 3, 2025 [2 tests, 1 revision]
Caching g Published on March 3, 2025 [2 tests, 1 revision]
restrictToNDecimals Published on March 3, 2025 [2 tests, 1 revision]
For..of vs traditional for loop for copying large amounts of elements Published on March 2, 2025 [2 tests, 1 revision]
Wrapped async/await vs. passing on a promise Published on March 2, 2025 [2 tests, 1 revision]
sort-object-keys Published on March 2, 2025 [2 tests, 1 revision]
shuffles Published on March 2, 2025 [4 tests, 1 revision]
Array comparison: stringify vs iteration Published on February 28, 2025 [4 tests, 3 revisions]
bit computation Published on February 28, 2025 [2 tests, 1 revision]
string concat vs array push Published on February 28, 2025 [3 tests, 2 revisions]
arr push vs pre-allocate Published on February 28, 2025 [2 tests, 1 revision]
toString() vs if Published on February 27, 2025 [2 tests, 1 revision]
Iteration/Recursion/Trampolining Published on February 27, 2025 [4 tests, 1 revision]
Literal construction vs memoised literal result Published on February 27, 2025 [2 tests, 1 revision]
js prealloc vs push Published on February 26, 2025 [2 tests, 1 revision]
Number vs BigInt Published on February 26, 2025 [3 tests, 2 revisions]
context.measureText() vs method Published on February 25, 2025 [10 tests, 3 revisions]
calculate amounts or strings for rendering price Published on February 25, 2025 [6 tests, 4 revisions]
Shallow array clone Published on February 25, 2025 [8 tests, 2 revisions]
Date init Published on February 25, 2025 [3 tests, 1 revision]
array buffer to hex pairs Published on February 25, 2025 [2 tests, 2 revisions]
hex pairs to array buffer Published on February 25, 2025 [2 tests, 1 revision]
Constant? Published on February 24, 2025 [2 tests, 2 revisions]
set vs. list: init + membership check Published on February 24, 2025 [2 tests, 2 revisions]
Refinement Costs Published on February 24, 2025 [6 tests, 1 revision]
Proxy vs native for loop Published on February 24, 2025 [2 tests, 1 revision]
Set vs Regex Published on February 24, 2025 [2 tests, 1 revision]
parameterCount Published on February 23, 2025 [2 tests, 2 revisions]
shuffle Published on February 23, 2025 [5 tests, 2 revisions]
shuffle Published on February 23, 2025 [2 tests, 1 revision]
concat/join-with-push/join-without-push/TextDecoder/fromCharCode Published on February 23, 2025 [5 tests, 15 revisions]
lodash wrapper Published on February 22, 2025 [2 tests, 1 revision]
nextSibling vs indexed childNodes Published on February 22, 2025 [4 tests, 1 revision]
現在時刻取得のパフォーマンス比較 Published on February 22, 2025 [4 tests, 1 revision]
String charAt vs. bracket notation Published on February 21, 2025 [2 tests, 1 revision]
Object Merge Performance Test Published on February 21, 2025 [2 tests, 1 revision]
regex test case Published on February 20, 2025 [2 tests, 1 revision]
Signal vs. primitive comparison Published on February 20, 2025 [2 tests, 1 revision]
linear or binary search Published on February 20, 2025 [2 tests, 1 revision]
Pure classnames VS helper Published on February 19, 2025 [7 tests, 3 revisions]
find Multibyte Published on February 18, 2025 [2 tests, 2 revisions]
Shorthand Object vs Explicit Published on February 18, 2025 [2 tests, 1 revision]
String.fromCharCode.apply vs String.fromCharCode(...input) Published on February 17, 2025 [2 tests, 1 revision]
dgfdg Published on February 17, 2025 [2 tests, 1 revision]
modulo vs bitwise Published on February 17, 2025 [3 tests, 2 revisions]
array merging Published on February 17, 2025 [4 tests, 1 revision]
Split to chars Published on February 16, 2025 [4 tests, 2 revisions]
Is There A Difference Between Symbol & Function Pointer Comparison? Published on February 16, 2025 [2 tests, 1 revision]
parseMove Published on February 16, 2025 [2 tests, 1 revision]
run Published on February 15, 2025 [3 tests, 1 revision]
Trusted Types vs String Published on February 14, 2025 [2 tests, 1 revision]
test reduce vs for Published on February 14, 2025 [2 tests, 2 revisions]
string.split string vs regex Published on February 14, 2025 [4 tests, 3 revisions]
includes vs comparison Published on February 14, 2025 [2 tests, 1 revision]
Direct and inherited fields Published on February 14, 2025 [2 tests, 2 revisions]
destructuring vs no Published on February 13, 2025 [3 tests, 2 revisions]
Data Layer Scan Published on February 12, 2025 [2 tests, 2 revisions]
All the loops Published on February 12, 2025 [4 tests, 1 revision]
Which approach to get access to the last element is faster Published on February 12, 2025 [2 tests, 1 revision]
Array reordering Published on February 12, 2025 [2 tests, 1 revision]
calculate event UID Published on February 11, 2025 [2 tests, 1 revision]
Get hostname from URL() or from regexp Published on February 11, 2025 [2 tests, 1 revision]
Testing Data Layer Search Published on February 11, 2025 [2 tests, 1 revision]
Faster parseBoard Published on February 11, 2025 [3 tests, 3 revisions]
map creation Published on February 11, 2025 [2 tests, 1 revision]
Safari 尾调用优化和蹦床Trampoline技术性能对比（使用 Safari 打开） Published on February 11, 2025 [3 tests, 6 revisions]
Chrome 使用尾调用和trampoline的性能对比（无尾调用优化） Published on February 11, 2025 [3 tests, 2 revisions]
Number conversion comparison Published on February 10, 2025 [2 tests, 1 revision]
Iterating over an array Published on February 10, 2025 [5 tests, 1 revision]
Iterating over a set Published on February 10, 2025 [4 tests, 1 revision]
test Published on February 10, 2025 [2 tests, 1 revision]
test Published on February 10, 2025 [2 tests, 1 revision]
Array destructuring Published on February 10, 2025 [4 tests, 1 revision]
test Published on February 10, 2025 [2 tests, 1 revision]
Linked List Queue.shift() vs Array.shif() Published on February 10, 2025 [2 tests, 1 revision]
Key check Published on February 9, 2025 [4 tests, 3 revisions]
For Vs Each Vs Map Published on February 8, 2025 [3 tests, 1 revision]
String Concat vs Array Join Published on February 8, 2025 [2 tests, 1 revision]
utc int time to readable string conversion Published on February 8, 2025 [4 tests, 3 revisions]
Document fragments VS appending directly Published on February 6, 2025 [2 tests, 1 revision]
Array push method vs setting via key Published on February 6, 2025 [3 tests, 1 revision]
array vs set Published on February 6, 2025 [2 tests, 1 revision]
canvas.measureText() with varying input lengths Published on February 5, 2025 [5 tests, 1 revision]
Object.groupBy() Published on February 5, 2025 [3 tests, 3 revisions]
maps Published on February 5, 2025 [2 tests, 1 revision]
mc_transformArray1K(n=2) Published on February 5, 2025 [5 tests, 1 revision]
var vs let vs const Published on February 5, 2025 [3 tests, 1 revision]
Right shift vs Division Published on February 5, 2025 [4 tests, 1 revision]
Merging objects Published on February 5, 2025 [5 tests, 1 revision]
stringify vs isEqual Published on February 5, 2025 [2 tests, 1 revision]
Array.some vs for loop Published on February 3, 2025 [2 tests, 3 revisions]
for loop vs map Published on February 3, 2025 [2 tests, 1 revision]
moment vs date Published on February 3, 2025 [2 tests, 1 revision]
polyndrome Published on January 31, 2025 [2 tests, 2 revisions]
isArray vs instanceof Array Published on January 31, 2025 [2 tests, 1 revision]
Hexchess stringify Published on January 31, 2025 [3 tests, 1 revision]
Shift vs Queue vs Slice Published on January 30, 2025 [3 tests, 2 revisions]
Replace quotes Published on January 30, 2025 [2 tests, 1 revision]