diff options
author | James M Snell <jasnell@gmail.com> | 2017-02-26 09:06:31 +0300 |
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committer | Italo A. Casas <me@italoacasas.com> | 2017-03-20 21:12:06 +0300 |
commit | dcac2d8f04663548fe10cabff47cca567aedc895 (patch) | |
tree | 2a39e74e1a9b759161afdbe251a2e54f0779af47 /benchmark | |
parent | d0fb578d6499a5fc6e6189c6239b9a75dbaedce0 (diff) |
benchmark: benchmark comparing forEach with for
PR-URL: https://github.com/nodejs/node/pull/11582
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Diffstat (limited to 'benchmark')
-rw-r--r-- | benchmark/es/foreach-bench.js | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/benchmark/es/foreach-bench.js b/benchmark/es/foreach-bench.js new file mode 100644 index 00000000000..fea5318bc66 --- /dev/null +++ b/benchmark/es/foreach-bench.js @@ -0,0 +1,82 @@ +'use strict'; + +const common = require('../common.js'); + +const bench = common.createBenchmark(main, { + method: ['for', 'for-of', 'for-in', 'forEach'], + count: [5, 10, 20, 100], + millions: [5] +}); + +function useFor(n, items, count) { + var i, j; + bench.start(); + for (i = 0; i < n; i++) { + for (j = 0; j < count; j++) { + /* eslint-disable no-unused-vars */ + var item = items[j]; + /* esline-enable no-unused-vars */ + } + } + bench.end(n / 1e6); +} + +function useForOf(n, items) { + var i, item; + bench.start(); + for (i = 0; i < n; i++) { + for (item of items) {} + } + bench.end(n / 1e6); +} + +function useForIn(n, items) { + var i, j, item; + bench.start(); + for (i = 0; i < n; i++) { + for (j in items) { + /* eslint-disable no-unused-vars */ + item = items[j]; + /* esline-enable no-unused-vars */ + } + } + bench.end(n / 1e6); +} + +function useForEach(n, items) { + var i; + bench.start(); + for (i = 0; i < n; i++) { + items.forEach((item) => {}); + } + bench.end(n / 1e6); +} + +function main(conf) { + const n = +conf.millions * 1e6; + const count = +conf.count; + + const items = new Array(count); + var i; + var fn; + for (i = 0; i < count; i++) + items[i] = i; + + switch (conf.method) { + case 'for': + fn = useFor; + break; + case 'for-of': + fn = useForOf; + break; + case 'for-in': + fn = useForIn; + break; + case 'forEach': + fn = useForEach; + break; + default: + throw new Error('Unexpected method'); + } + fn(n, items, count); +} |