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doc: add multiple build guide to benchmarking doc · nodejs/node@83902e6 · GitHub

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Peter Marton
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gibfahn
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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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‎doc/guides/writing-and-running-benchmarks.md‎

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@@ -164,6 +164,19 @@ First build two versions of Node.js, one from the master branch (here called
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`./node-master`) and another with the pull request applied (here called
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`./node-pr-5134`).
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To run multiple compiled versions in parallel you need to copy the output of the
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build: `cp ./out/Release/node ./node-master`. Check out the following example:
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```console
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$ git checkout master
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$ ./configure && make -j4
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$ cp ./out/Release/node ./node-master
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$ git checkout pr-5134
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$ ./configure && make -j4
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$ cp ./out/Release/node ./node-pr-5134
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```
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The `compare.js` tool will then produce a csv file with the benchmark results.
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```console

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