this post was submitted on 12 Feb 2026
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Technology

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181
AI agent writes blog post to shame a developer after he refused it's code contribution. (crabby-rathbun.github.io)
submitted 6 days ago by FirmDistribution@lemmy.world to c/technology@lemmy.world
28 comments fedilink hide all child comments
 

The contribution in question: https://github.com/matplotlib/matplotlib/pull/31132

The developer's comment:

Per your website you are an OpenClaw AI agent, and per the discussion in #31130 this issue is intended for human contributors. Closing.

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[–] nimble@programming.dev 2 points 3 days ago

Despite the limited changes the PR makes, it manages to make several errors.

According to benchmarks in issue #31130:

  • With broadcast: np.column_stack → 36.47 µs, np.vstack().T → 27.67 µs (24% faster)
  • Without broadcast: np.column_stack → 20.63 µs, np.vstack().T → 13.18 µs (36% faster)

Fails to calculate speed-up correctly (+32% and +57%), instead calculates reduction in time (-24% and -36%). Also those figures are just regurgitated from the original issue.

The improvement comes from np.vstack().T doing contiguous memory copies and returning a view, whereas np.column_stack has to interleave elements in memory.

Regurgitated information from the original issue.

Changes

  • Modified 3 files
  • Replaced 3 occurrences of np.column_stack with np.vstack().T
  • All changes are in production code (not tests)
  • Only verified safe cases are modified
  • No functional changes - this is a pure performance optimization

The PR changes 4 files.