view .clang-format @ 51552:49faa72b994e

streamclone: stop listing files for entries that have no volatile files

This will save a lot of python related time.

This significantly boost performance. The following number comes from a large
private repository using perf::stream-locked-section:

base-line:   35.04 seconds
prev-change: 24.51 seconds (-30%)
prev-change: 20.88 seconds (-40%)
prev-change: 14.22 seconds (-60%)
this-change: 11.58 seconds (-67% from baseline; -18% from prev)

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