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Sweep 22 Oct 2026 · 04:32Z Build v2.1.308 527 read Stable v2.1.308 Latest v2.1.308 Next v2.1.308 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.227 ·

Query profiling now needs an environment variable

Query profiling only runs when you set CLAUDE_CODE_PROFILE_QUERY, so ordinary sessions skip it.

Use it now Notable No documentation found Internal Changes
JSON All of v2.1.227
Use it nowTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
PerformanceArea: what it touches
Internal ChangesKind: in v2.1.227,
What probably matters to youSection of the release
What

Timing marks, memory snapshots and the timeline dump only run when CLAUDE_CODE_PROFILE_QUERY is set, so ordinary sessions no longer collect them.

Details
  • Marks and memory snapshots are cleared at the start of each query.
  • The ASCII bars in the dump are built with a repeat helper.
Usage
CLAUDE_CODE_PROFILE_QUERY=1 claude
Evidence

CLAUDE_CODE_PROFILE_QUERY

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Read from
Names in the bundleCLAUDE_CODE_PROFILE_QUERY

See this entry in the whole of v2.1.227 →

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