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util: faster arrayToHash

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The `util.format()` is used frequently, make the method faster
is better.

R-URL: https://github.com/nodejs/node/pull/3964
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Brian White <mscdex@mscdex.net>
Reviewed-By: James M Snell <jasnell@gmail.com>
This commit is contained in:
Jackson Tian 2015-11-22 17:08:45 +08:00 committed by James M Snell
parent 1de6e4f9ab
commit 3e740caaf3
3 changed files with 21 additions and 2 deletions
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3
Makefile
View File

@ -493,6 +493,9 @@ bench-url: all
bench-events: all
@$(NODE) benchmark/common.js events
bench-util: all
@$(NODE) benchmark/common.js util
bench-all: bench bench-misc bench-array bench-buffer bench-url bench-events
bench: bench-net bench-http bench-fs bench-tls

15
benchmark/util/inspect.js Normal file
View File

@ -0,0 +1,15 @@
var util = require('util');
var common = require('../common.js');
var bench = common.createBenchmark(main, {n: [5e6]});
function main(conf) {
var n = conf.n | 0;
bench.start();
for (var i = 0; i < n; i += 1) {
var r = util.inspect({a: 'a', b: 'b', c: 'c', d: 'd'});
}
bench.end(n);
}

5
lib/util.js
View File

@ -163,9 +163,10 @@ function stylizeNoColor(str, styleType) {
function arrayToHash(array) {
var hash = Object.create(null);
array.forEach(function(val) {
for (var i = 0; i < array.length; i++) {
var val = array[i];
hash[val] = true;
});
}
return hash;
}