view .clang-format @ 41109:3e1960e23e6b

delta: reuse _findsnapshot call from previous stage

Two different stage of the sparse-revlog logic needs the _findsnapshot data.
To avoid recomputing it twice, make it possible to reuse the first computation
in the second step.

example affected manifest write
before: 0.067141s
after:  0.064252s (-5%)

(total gain since start of series: 95%)

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