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buffer.length performance regressed in 6.5.0 #9006

@Nibbler999

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@Nibbler999
  • Version: v6.7.0
  • Platform: Linux x86_64
  • Subsystem: Buffer
[nibbler@nibbler ~]$ cat buffer.js 
'use strict';

var data = new Buffer(1024);

console.time('test');

for (var i = 0; i < 1000000; i++) {
    for (var j = 0; j < data.length; j++) {

    }
}

console.timeEnd('test');

[nibbler@nibbler ~]$ ~/Downloads/node-v6.4.0-linux-x64/bin/node buffer.js 
test: 623.471ms
[nibbler@nibbler ~]$ ~/Downloads/node-v6.5.0-linux-x64/bin/node buffer.js 
test: 2837.938ms

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    performanceIssues and PRs related to the performance of Node.js.v8 engineIssues and PRs related to the V8 dependency.

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