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view tests/fixtures/empty-log-message.svndump @ 1475:ea4d6142c6d9
maps: do not ask sqlite for row count
"SELECT COUNT(1) FROM x" is not O(1) for sqlite and can be slow on large
tables. This patch changes the count to be backed by a file instead.
The change exposes a risk that the number may become inaccurate, if
__setitem__ is called with a same key multiple times. But we don't do that
during pull, and only use __len__ to calculate how many revisions pulled,
or test if the map is empty. So it would be fine.
| author | Jun Wu <quark@fb.com> |
|---|---|
| date | Thu, 23 Jun 2016 10:46:07 +0100 |
| parents | cc1d4aa3ba41 |
| children |
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SVN-fs-dump-format-version: 2 UUID: 2abea918-74b5-4124-b744-a1f76c91de90 Revision-number: 0 Prop-content-length: 56 Content-length: 56 K 8 svn:date V 27 2010-11-18T14:30:05.275138Z PROPS-END Revision-number: 1 Prop-content-length: 100 Content-length: 100 K 7 svn:log V 0 K 10 svn:author V 6 danchr K 8 svn:date V 27 2010-11-18T14:30:36.517160Z PROPS-END Node-path: branches Node-kind: dir Node-action: add Prop-content-length: 10 Content-length: 10 PROPS-END Node-path: tags Node-kind: dir Node-action: add Prop-content-length: 10 Content-length: 10 PROPS-END Node-path: trunk Node-kind: dir Node-action: add Prop-content-length: 10 Content-length: 10 PROPS-END Node-path: trunk/A Node-kind: file Node-action: add Prop-content-length: 10 Text-content-length: 0 Text-content-md5: d41d8cd98f00b204e9800998ecf8427e Text-content-sha1: da39a3ee5e6b4b0d3255bfef95601890afd80709 Content-length: 10 PROPS-END