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Ran 19 Jan 2026 08:39AM UTC

Files 274

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Committed 19 Jan 2026 08:38AM UTC coverage: 96.146% (+0.001%) from 96.145%

Job # 2416.1

Build Type

push

github

Committed by

bobzhang

Commit Message

fix: prevent Map::merge_in_place from growing when merging with self

When a map is merged with itself, the current implementation iterates
over all entries and calls set_with_hash for each. If the map is at
its growth threshold (size >= grow_at), this triggers an unnecessary
capacity doubling even though no new entries are being added.

Add an early return when self and other are physically equal, since
merging a map with itself is a no-op (all keys already exist with the
same values).

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Run Details

11100 of 11545 relevant lines covered (96.15%)

417691.88 hits per line

moonbitlang / core / 2416 / 1
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main: 96%

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