view .clang-format @ 42463:a0b26fc8fbba

deltas: skip if projected delta size does not match text size constraint Before computing any delta, we get a basic estimation of the delta size we can expect and the resulted compressed value. We then checks this projected size against the ½ⁿ size constraints. This allows to exclude potential base candidates before doing any expensive computation. This only apply to the intermediate-snapshot case since this constraint only apply to them. In practice we only perform this new checks for the manifestlog. Manifest log combine two property: it is likely to have delta chain issue and its diffing/compression is fairly predictable. The initial author of this changeset is Valentin Gatien-Baron providing the initial idea and initial testing, Pierre-Yves David later consolidated the code in the right location and run more extensive testing.
author Valentin Gatien-Baron <vgatien-baron@janestreet.com>, Pierre-Yves David <pierre-yves.david@octobus.net>
date Thu, 25 Apr 2019 22:30:14 +0200
parents d0a3fa849cb8
children
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