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
<script>
function Dictionary(kvPairs) {
kvPairs = kvPairs === undefined ? [] : kvPairs;
var kvPairsLength = kvPairs.length;
// instance variables
this.size = 0;
this._keyIndex = {};
this._keys = [];
this._values = [];
this._tailIndex = 0;
this._isCompact = true;
// methods
this.put = put;
this.puts = puts;
this.get = get;
this.gets = gets;
this.remove = remove;
this.keys = keys;
this.values = values;
this.keyValuePairs = keyValuePairs;
this.forEachKey = forEachKey;
this.forEachValue = forEachValue;
this.forEachKeyValue = forEachKeyValue;
this._compact = compact;
// initialization
this.puts(kvPairs);
}
function put(key, value) {
var keyIndex = this._keyIndex;
var index = keyIndex[key];
if (index === undefined) {
index = this._tailIndex++;
keyIndex[key] = index;
++this.size;
}
this._keys[index] = key;
this._values[index] = value;
}
function puts(kvPairs) {
var kvPairsLength = kvPairs.length;
for (var i = 0; i < kvPairsLength; ++i) {
var kvPair = kvPairs[i];
this.put(kvPair[0], kvPair[1]);
}
}
function get(key) {
return this._values[this._keyIndex[key]];
}
function gets(keys) {
var keysLength = keys.length;
var result = new Array(keysLength);
for (var i = 0; i < keysLength; ++i) {
result[i] = this._values[this._keyIndex[keys[i]]];
}
return result;
}
// does not yet resize arrays
function remove(key) {
var keyIndex = this._keyIndex;
var index = keyIndex[key];
if (index !== undefined) {
keyIndex[key] = undefined;
this._keys[index] = undefined;
this._values[index] = undefined;
--this.size;
this._isCompact = false;
}
}
function keys() {
if (!this._isCompact) {
this._compact();
this._isCompact = true;
}
return this._keys.slice();
}
function values() {
if (!this._isCompact) {
this._compact();
this._isCompact = true;
}
return this._values.slice();
}
function compact() {
var keys = this._keys;
var values = this._values;
var index = keys.indexOf(undefined);
console.log(index);
while (index !== -1) {
keys.splice(index, 1);
values.splice(index, 1);
index = keys.indexOf(undefined, index);
--this._tailIndex;
}
}
function keyValuePairs() {
if (!this._isCompact) {
this._compact();
this._isCompact = true;
}
var keys = this._keys;
var values = this._values;
var keysLength = keys.length;
var result = new Array(keysLength);
for (var i = 0; i < keysLength; ++i) {
result[i] = [keys[i], values[i]];
}
return result;
}
function forEachKey(callback) {
forEach(this.keys(), callback);
}
function forEachValue(callback) {
forEach(this.values(), callback);
}
function forEach(array, callback) {
var arrayLength = array.length;
for (var i = 0; i < arrayLength; ++i) {
callback(array[i]);
}
}
function forEachKeyValue(callback) {
var kvPairs = this.keyValuePairs();
var kvPairsLength = kvPairs.length;
for (var i = 0; i < kvPairsLength; ++i) {
var pair = kvPairs[i];
callback(pair[0], pair[1]);
}
}
</script>
var a = new Array(1000);
for (var i = 0; i < a.length; ++i) {
a[i] = [i, i];
}
var d = new Dictionary(a);
Ready to run.
Test | Ops/sec | |
---|---|---|
1 |
| ready |
2 |
| ready |
You can edit these tests or add more tests to this page by appending /edit to the URL.