Created
December 17, 2018 15:17
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RegExp benchmark of some cases in Node.js
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const tests = Array(10000).fill().map(() => ( | |
// Array(10).fill().map(() => sample(Array.from('アイウエオカキクケコサシスセソタチツテトナニヌネノハヒフヘホマミムメモヤユヨラリルレロワヲン'))).join('') | |
Array(10).fill().map(() => sample(Array.from('0123456789'))).join('') | |
)); | |
console.time('empty'); | |
for (let i = 0; i < 1e8; i++) ; | |
console.timeEnd('empty'); | |
console.time('case1'); | |
for (let i = 0; i < 1e8; i++) { | |
tests[i % 10000].match(/^(?:1(?:1(?:1|2|3)|2(?:1|2|3)|3(?:1|2|3))|2(?:1(?:1|2|3)|2(?:1|2|3)|3(?:1|2|3))|3(?:1(?:1|2|3)|2(?:1|2|3)|3(?:1|2|3)))/); | |
} | |
console.timeEnd('case1'); | |
console.time('case2'); | |
for (let i = 0; i < 1e8; i++) { | |
tests[i % 10000].match(/^(1(1(1|2|3)|2(1|2|3)|3(1|2|3))|2(1(1|2|3)|2(1|2|3)|3(1|2|3))|3(1(1|2|3)|2(1|2|3)|3(1|2|3)))/); | |
} | |
console.timeEnd('case2'); | |
console.time('case3'); | |
for (let i = 0; i < 1e8; i++) { | |
tests[i % 10000].match(/^(?:111|112|113|121|122|123|131|132|133|211|212|213|221|222|223|231|232|233|311|312|313|321|322|323|331|332|333)/); | |
} | |
console.timeEnd('case3'); | |
console.time('case4'); | |
for (let i = 0; i < 1e8; i++) { | |
'314159265900000'.match(/^(3141592650|3141592651|3141592652|3141592653|3141592654|3141592655|3141592656|3141592657|3141592658|3141592659)/); | |
} | |
console.timeEnd('case4'); | |
console.time('case5'); | |
for (let i = 0; i < 1e8; i++) { | |
'314159265900000'.match(/^(314159265(?:0|1|2|3|4|5|6|7|8|9))/); | |
} | |
console.timeEnd('case5'); | |
console.time('case6'); | |
for (let i = 0; i < 1e8; i++) { | |
'314159265900000'.match(/^(3141592650|1414213560|3141592651|1414213561|3141592652|1414213562|3141592653|1414213563|3141592654|1414213564|3141592655|1414213565|3141592656|1414213566|3141592657|1414213567|3141592658|1414213568|3141592659|1414213569)/); | |
} | |
console.timeEnd('case6'); | |
console.time('case7'); | |
for (let i = 0; i < 1e8; i++) { | |
'314159265900000'.match(/^(314159265(?:0|1|2|3|4|5|6|7|8|9)|141421356(?:0|1|2|3|4|5|6|7|8|9))/); | |
} | |
console.timeEnd('case7'); |
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empty: 131.988ms | |
case1: 3782.656ms | |
case2: 6568.509ms | |
case3: 3711.207ms | |
case4: 8385.808ms | |
case5: 8676.228ms | |
case6: 8623.019ms | |
case7: 8782.216ms |
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