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.
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mscdex
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util
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| 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.
function myMethod(a,b) {
/** ... **/
}
common.v8ForceOptimization(myMethod, 'a', 'b');
myMethod('a', 'b');
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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 |
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One minor style nit, but otherwise LGTM |
fixed spacing nit.
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Fixed the minor style. |
jasnell
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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]>
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Landed in 6abb06f |
Fishrock123
pushed a commit
that referenced
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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.