git-annex/doc/devblog/day_562__on_to_metadata.mdwn
2019-01-07 16:36:34 -04:00

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Continuing with the ByteString conversion marathon, today worked on
converting the metadata types. Actually, metadata field names made more
sense to change to Text, since they're limited to a subset of utf-8.
I lost 2 hours to a puzzling quickcheck failure of metadata serialization.
It turned out to involve unicode non-breaking spaces. Aaargh.
Otherwise, fairly straightforward changes, but metadata is used all over
git-annex, so the final patch was nearly 1000 lines.
Benchmark time:
setting metadata in 1000 files...... 1% speedup
getting metadata from 1000 files.... 0.5% speedup
finding a single file out of 1000 that has a given metadata value... 5% speedup