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Ran 20 May 2026 03:38PM UTC

Files 658

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Committed 20 May 2026 03:19PM UTC coverage: 88.846% (-0.02%) from 88.862%

Job # #20287.1

Build Type

push

github

Committed by

ejona86

Commit Message

xds: Reduce per-endpoint memory from CDS

The locality name is long, so we don't want a different copy for each
endpoint. The PathChains can use a similar amount of memory, so we also
want to share them.

The code no longer re-creates the EAG and Attributes, reducing garbage;
that isn't as important as we're more concerned about retained memory in
steady-state. But there was little reason for the waste, thus the
cleanup.

This fixes a bug for PathChains longer than 2 entries, which was never
triggered as our PathChains are always 2 entries long. Previously the
code would discard all but the first and last entry, with the same
pathChain.next being repeatedly overwritten.

Noticed the memory use when investigating b/507652503.

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