comparison mercurial/revlog.py @ 39157:a98e926b2f5b

revlog: only consider the span of the delta section

Since the number of snapshots is limited we can exclude them from the logic
checking size and number of reads. Limiting the span computation to the delta
section will allow for further optimization.

39156:b3b4bee161cf

            if base != nullrev:
                deltachain = self._deltachain(base)[0]
            else:
                deltachain = []

            chunks = _slicechunk(self, deltachain, deltainfo)
            all_span = [_segmentspan(self, revs, deltainfo) for revs in chunks]
            distance = max(all_span)
        else:
            distance = deltainfo.distance

39157:a98e926b2f5b

            if base != nullrev:
                deltachain = self._deltachain(base)[0]
            else:
                deltachain = []

            # search for the first non-snapshot revision
            for idx, r in enumerate(deltachain):
                if not self.issnapshot(r):
                    break
            deltachain = deltachain[idx:]
            chunks = _slicechunk(self, deltachain, deltainfo)
            all_span = [_segmentspan(self, revs, deltainfo) for revs in chunks]
            distance = max(all_span)
        else:
            distance = deltainfo.distance