[GitHub] [arrow-datafusion] r4ntix commented on a diff in pull request #6546: Docs: add more PR guidance in contributing guide (smaller PRs)

["r4ntix (via GitHub)" <gi...@apache.org>]

r4ntix commented on code in PR #6546:
URL: https://github.com/apache/arrow-datafusion/pull/6546#discussion_r1218795543


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docs/source/contributor-guide/index.md:
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@@ -41,11 +41,29 @@ DataFusion is a very active fast-moving project and we try to review and merge P
 
 Review bandwidth is currently our most limited resource, and we highly encourage reviews by the broader community. If you are waiting for your PR to be reviewed, consider helping review other PRs that are waiting. Such review both helps the reviewer to learn the codebase and become more expert, as well as helps identify issues in the PR (such as lack of test coverage), that can be addressed and make future reviews faster and more efficient.
 
-Things to help look for in a PR:
+## Creating Pull Requests
+
+We recommend splitting your contributions into smaller PRs rather than large PRs (500+ lines) because:
+
+1. The PR is more likely to be reviewed quickly -- our reviewers struggle to find the contiguous time needed to review large PRs.
+2. The PR discussions tend to be more focused and less likely to get lost among several different threads.
+3. It is often easier to accept and act on feedback when it comes early on in a small change, before a particular approach has been polished too much.
+
+If you are concerned that a larger design will be lost in a string of small PRs, creating a large draft PR that shows how they all work together can help.
+
+# Reviewing Pull Requests
+
+When reviewing PRs, please remember our primary goal is to improve DataFusion and its community together. PR feedback should be constructive with the aim to help improve the code as well as the understanding of the contributor.
+
+Please ensure any issues you raise contains a rationale and suggested alternative -- it is frustrating to be told "don't do it this way" without any clear reason or alternate provided.

Review Comment:
   ❤️



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