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deltas: skip if projected compressed size is bigger than previous snapshot...
deltas: skip if projected compressed size is bigger than previous snapshot If we have a delta, we check constraints against a lower bound estimate of the resulting compressed delta. We then checks this projected size against the `size(snapshotⁿ) > size(snapshotⁿ⁺¹)` constraint. 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. For some pathological cases of a private repository this step provide a further performance boost (timing from `hg perfrevlogwrite`): before: 3.010646 seconds after: 2.609307 seconds

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rustfmt.toml
3 lines | 66 B | application/toml | TOMLLexer
Georges Racinet
rust: pure Rust lazyancestors iterator...
r40307 max_width = 79
wrap_comments = true
error_on_line_overflow = true