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comparison mercurial/revlogutils/deltas.py @ 40957:f960c51eebf3

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delta: filter nullrev out first When picking a potential candidate, we filter them on various criteria. The "different from nullrev" criteria is very fast to compute and we should process it first.
author Boris Feld <boris.feld@octobus.net>
date Thu, 06 Dec 2018 10:39:05 +0100
parents 39d29542fe40
children 42f59d3f714d
comparison
equal deleted inserted replaced
40956:74ee5ff1e81c 40957:f960c51eebf3
631 and not (rev == nullrev 631 and not (rev == nullrev
632 or rev in tested 632 or rev in tested
633 or deltalength(rev))): 633 or deltalength(rev))):
634 tested.add(rev) 634 tested.add(rev)
635 rev = deltaparent(rev) 635 rev = deltaparent(rev)
636 # no need to try a delta against nullrev, this will be done as a
637 # last resort.
638 if rev == nullrev:
639 continue
636 # filter out revision we tested already 640 # filter out revision we tested already
637 if rev in tested: 641 if rev in tested:
638 continue 642 continue
639 tested.add(rev) 643 tested.add(rev)
640 # filter out delta base that will never produce good delta 644 # filter out delta base that will never produce good delta
641 if deltas_limit < revlog.length(rev): 645 if deltas_limit < revlog.length(rev):
642 continue
643 # no need to try a delta against nullrev, this will be done as a
644 # last resort.
645 if rev == nullrev:
646 continue 646 continue
647 # no delta for rawtext-changing revs (see "candelta" for why) 647 # no delta for rawtext-changing revs (see "candelta" for why)
648 if revlog.flags(rev) & REVIDX_RAWTEXT_CHANGING_FLAGS: 648 if revlog.flags(rev) & REVIDX_RAWTEXT_CHANGING_FLAGS:
649 continue 649 continue
650 group.append(rev) 650 group.append(rev)