comparison mercurial/localrepo.py @ 34881:8c9b08a0c48c

sparse-read: skip gaps too small to be worth splitting

Splitting at too small gaps might not be worthwhile. With this changeset,
we stop considering splitting on too small gaps. The threshold is configurable.
We arbitrarily pick 256K as a default value because it seems "okay".
Further testing on various repositories and setups will be needed to tune it.

The option name is 'experimental.sparse-read.min-gap-size`, and replaces
`experimental.sparse-read.min-block-size` which is not used any more.

34880:9e18ab7f7240

        if mmapindexthreshold is not None:
            self.svfs.options['mmapindexthreshold'] = mmapindexthreshold
        withsparseread = self.ui.configbool('experimental', 'sparse-read')
        srdensitythres = float(self.ui.config('experimental',
                                              'sparse-read.density-threshold'))
        srminblocksize = self.ui.configbytes('experimental',
                                             'sparse-read.min-block-size')
        self.svfs.options['with-sparse-read'] = withsparseread
        self.svfs.options['sparse-read-density-threshold'] = srdensitythres
        self.svfs.options['sparse-read-min-block-size'] = srminblocksize

        for r in self.requirements:
            if r.startswith('exp-compression-'):
                self.svfs.options['compengine'] = r[len('exp-compression-'):]

34881:8c9b08a0c48c

        if mmapindexthreshold is not None:
            self.svfs.options['mmapindexthreshold'] = mmapindexthreshold
        withsparseread = self.ui.configbool('experimental', 'sparse-read')
        srdensitythres = float(self.ui.config('experimental',
                                              'sparse-read.density-threshold'))
        srmingapsize = self.ui.configbytes('experimental',
                                           'sparse-read.min-gap-size')
        self.svfs.options['with-sparse-read'] = withsparseread
        self.svfs.options['sparse-read-density-threshold'] = srdensitythres
        self.svfs.options['sparse-read-min-gap-size'] = srmingapsize

        for r in self.requirements:
            if r.startswith('exp-compression-'):
                self.svfs.options['compengine'] = r[len('exp-compression-'):]