benchmark: util._extend vs object.assign#7255
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To copy the values of all enumerable own properties from- a source object to a target object, node still use- `util._extend`, though newer standard `Object.assign` is available. This is because `util._extend` is found to be faster than `Object.assign`. This benchmark test is to keep track of how performance compare.
nodejs-github-bot added the benchmark 
2 tasks
mscdex added util 
| const bench = common.createBenchmark(main,{ | ||
| type: ['util._extend', 'Object.assign', | ||
| 'util._extend', 'Object.assign'], |
| if (conf.type === 'extend'){ | ||
| fn = util._extend; | ||
| v8command = '%OptimizeFunctionOnNextCall(util._extend)' | ||
| } else if (conf.type === 'assign'){ |
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FYI: https://github.com/nodejs/node/blob/master/benchmark/common.js#L255
the benchmark/common.js now has a method for handling the details of v8 optimization for you. e.g.
functionmyMethod(a,b){/** ... **/}common.v8ForceOptimization(myMethod,'a','b');myMethod('a','b');
Member
jasnell commented Jun 20, 2016
Couple of minor nits but LGTM if @mscdex is happy with it. |
| v8command = '%OptimizeFunctionOnNextCall(util._extend)' | ||
| } else if (conf.type === 'assign'){ | ||
| fn = Object.assign; | ||
| //Object.assign is built-in, cannot be optimized |
Contributor
mscdex commented Jun 20, 2016
One minor style nit, but otherwise LGTM |
fixed spacing nit.
ContributorAuthor
suryagh commented Jun 20, 2016
Fixed the minor style. |
jasnell pushed a commit that referenced this pull request Jun 27, 2016
To copy the values of all enumerable own properties from- a source object to a target object, node still use- `util._extend`, though newer standard `Object.assign` is available. This is because `util._extend` is found to be faster than `Object.assign`. This benchmark test is to keep track of how performance compare. PR-URL: #7255 Reviewed-By: James M Snell <[email protected]> Reviewed-By: Brian White <[email protected]>
Member
jasnell commented Jun 27, 2016
Landed in 6abb06f |
Fishrock123 pushed a commit that referenced this pull request Jul 5, 2016
To copy the values of all enumerable own properties from- a source object to a target object, node still use- `util._extend`, though newer standard `Object.assign` is available. This is because `util._extend` is found to be faster than `Object.assign`. This benchmark test is to keep track of how performance compare. PR-URL: #7255 Reviewed-By: James M Snell <[email protected]> Reviewed-By: Brian White <[email protected]>
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Checklist
make -j4 test(UNIX) orvcbuild test nosign(Windows) passesAffected core subsystem(s)
benchmark
Description of change
To copy the values of all enumerable properties from-
a source object to a target object, node still use-
util._extend, though newer standardObject.assignis available. This is because
util._extendis found tobe faster than
Object.assign. This benchmark test isto keep track of how performance compare.