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doc: add multiple build guide to benchmarking doc

PR-URL: #16142
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
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Peter Marton authored and apapirovski committed Oct 27, 2017
1 parent 5118f31 commit 24388771ea6660ed53ee2f91672af7afaab334b0
Showing with 13 additions and 0 deletions.
  1. +13 −0 doc/guides/writing-and-running-benchmarks.md
@@ -164,6 +164,19 @@ First build two versions of Node.js, one from the master branch (here called
`./node-master`) and another with the pull request applied (here called
`./node-pr-5134`).

To run multiple compiled versions in parallel you need to copy the output of the
build: `cp ./out/Release/node ./node-master`. Check out the following example:

```console
$ git checkout master
$ ./configure && make -j4
$ cp ./out/Release/node ./node-master

$ git checkout pr-5134
$ ./configure && make -j4
$ cp ./out/Release/node ./node-pr-5134
```

The `compare.js` tool will then produce a csv file with the benchmark results.

```console

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