Test case details

Preparation Code

let acc1 = 0; // regex let acc2 = 0; // <= let acc3 = 0; // with ord() <= let acc4 = 0; // with ord() <= let acc5 = 0; // with ord() <= let acc6 = 0; let acc7 = 0; const Regex1=(/[^a-zA-Z0-9_]/); const Regex2=(/[^\w]/); const Regex3=(/^[\w]+/);

Test cases

Test #1

for(let i = 0; i < 1000; ++i) { let str = `${i} ${i}`; acc1 += str.slice(2).search(Regex1); }

Test #2

for(let i = 0; i < 1000; ++i) { let str = `${i} ${i}`; let j = 2; let char = str[j]; while( char >= 'a' && char <= 'z' || char >= 'A' && char <= 'Z' || char >= '0' && char <= '9' || char === '_' ) char = str[++j]; acc2 += j; }

Test #3

for(let i = 0; i < 1000; ++i) { let str = `${i} ${i}`; let j = 2; let char = str.codePointAt(j); while( char >= 97 && char <= 122 || char >= 65 && char <= 90 || char >= 48 && char <= 57 || char === '_' ) char = str.codePointAt(++j); acc3 += j; }

Test #4

for(let i = 0; i < 1000; ++i) { let str = `${i} ${i}`; let j = 2; let char = str.charCodeAt(j); while( char >= 97 && char <= 122 || char >= 65 && char <= 90 || char >= 48 && char <= 57 || char === '_' ) char = str.charCodeAt(++j); acc4 += j; }

Test #5

for(let i = 0; i < 1000; ++i) { let str = `${i} ${i}`; acc5 += str.slice(2).search(Regex2); }

Test #6

for(let i = 0; i < 1000; ++i) { let str = `${i} ${i}`; Regex3.exec(str.slice(2)); acc6 += Regex3.lastIndex; }

Test #7

for(let i = 0; i < 1000; ++i) { let str = `${i} ${i}`; const reg = /^[\w]+/; reg.exec(str.slice(2)); acc7 += reg.lastIndex; }