edponce commented on a change in pull request #9712:
URL: https://github.com/apache/arrow/pull/9712#discussion_r594603148
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File path: docs/source/developers/benchmarks.rst
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@@ -103,6 +123,16 @@ expressions.
--suite-filter=compute-aggregate --benchmark-filter=Kernel \
/tmp/arrow-bench*/{WORKSPACE,master}/build
+Instead of rerunning benchmarks on comparison, a JSON file (generated by
+``archery benchmark run``) may be specified for the contender and/or the
+baseline.
+
+.. code-block:: shell
+ archery benchmark run --output=baseline.json $HOME/arrow/cpp/release-build
+ git checkout some-feature
+ archery benchmark run --output=contender.json $HOME/arrow/cpp/release-build
+ archery benchmark diff contender.json baseline.json
+
Review comment:
Thanks for adding this info. I will most likely benefit from the
capability of saving benchmark results in JSON files and being able to compare
them at will.
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