Mercurial > hg > mercurial-crew-with-dirclash
view tests/test-update-reverse @ 5451:0a43875677b1
revlog: break up compression of large deltas
Python's zlib apparently makes an internal copy of strings passed to
compress(). To avoid this, compress strings 1M at a time, then join
them at the end if the result would be smaller than the original.
For initial commits of large but compressible files, this cuts peak
memory usage nearly in half.
| author | Matt Mackall <mpm@selenic.com> |
|---|---|
| date | Thu, 11 Oct 2007 00:46:54 -0500 |
| parents | 7544700fd931 |
| children |
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#!/bin/sh hg init touch a hg add a hg commit -m "Added a" -d "1000000 0" touch main hg add main hg commit -m "Added main" -d "1000000 0" hg checkout 0 echo Main should be gone ls touch side1 hg add side1 hg commit -m "Added side1" -d "1000000 0" touch side2 hg add side2 hg commit -m "Added side2" -d "1000000 0" hg log echo Should have two heads, side2 and main hg heads echo Should show "a side1 side2" ls hg update --debug -C 1 echo Should only show "a main" ls