upstream/mercurial-mirror Files · mercurial/thirdparty/cbor/__init__.py

deltas: skip if projected delta size is bigger than previous snapshot...

deltas: skip if projected delta size is bigger than previous snapshot 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 `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 significant performance boost (timing from `hg perfrevlogwrite`): before: 14.115908 seconds after: 3.145906 seconds

Gregory Szorc - - Load All Authors

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        Gregory Szorc
    
cbor: import CBORDecoder and CBOREncoder...

              r37231
            
      from .cbor2 import (

          CBORDecodeError,

          CBORDecoder,

          CBOREncodeError,

          CBOREncoder,

          dump,

          dumps,

          load,

          loads,

      )

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Gregory Szorc cbor: import CBORDecoder and CBOREncoder...	r37231	from .cbor2 import (
		CBORDecodeError,
		CBORDecoder,
		CBOREncodeError,
		CBOREncoder,
		dump,
		dumps,
		load,
		loads,
		)