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> /p/google/v8/out.gn/x64.release/d8 test.js | |
testFuncExpr 1345 ms | |
testFuncDecl 347 ms |
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'use strict'; | |
function testFuncExpr(arr){ | |
let result = 0; | |
arr.forEach((c) => { if(c % 2) result++ }); | |
return result; | |
} | |
function testFuncDecl(arr){ | |
let result = 0; | |
const fn = (c) => { if(c % 2) result++ }; | |
arr.forEach(fn); | |
return result; | |
} | |
var ARRAYS = [ | |
[0,1,2,3,4,5], | |
[0,2,2,3,4,5], | |
[0,3,2,3,4,5], | |
[0,4,2,3,4,5], | |
[0,5,2,3,4,5], | |
[0,6,2,3,4,5] | |
]; | |
function run(i, isFuncExpr){ | |
let arr = ARRAYS[i % ARRAYS.length]; | |
if (isFuncExpr) return testFuncExpr(arr); | |
else return testFuncDecl(arr); | |
} | |
function bench(isFuncExpr){ | |
const start = Date.now(); | |
let end = 0; | |
for (let i = 0; i < 1e7; ++i) { | |
run(i, isFuncExpr); | |
} | |
end = Date.now(); | |
print(isFuncExpr ? 'testFuncExpr' : 'testFuncDecl', end - start, 'ms'); | |
} | |
// Warmup | |
run(0, true); | |
run(0, false); | |
run(1, true); | |
run(1, false); | |
// Bench | |
bench(true); | |
bench(false); |
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