comparison mercurial/changegroup.py @ 19708:fd4f612f7cb6 stable

bundle: fix performance regression when bundling file changes (issue4031)

Somewhere before 2.7, a change [ec896f9e8894] was committed that
entailed a large performance regression when bundling (and therefore
remote cloning) repositories. For each file in the repository, it would
recompute the set of needed changesets even though it is the same for
all files. This computation would dominate bundle runtimes according to
profiler output (by 10x or more).

19706:26ddce1a2a55

                                reorder=reorder):
            yield chunk
        progress(msgbundling, None)

        mfs.clear()

        def linknodes(filerevlog, fname):
            if fastpathlinkrev:
                ln, llr = filerevlog.node, filerevlog.linkrev
                needed = set(cl.rev(x) for x in clnodes)
                def genfilenodes():
                    for r in filerevlog:
                        linkrev = llr(r)
                        if linkrev in needed:
                            yield filerevlog.node(r), cl.node(linkrev)

19708:fd4f612f7cb6

                                reorder=reorder):
            yield chunk
        progress(msgbundling, None)

        mfs.clear()
        needed = set(cl.rev(x) for x in clnodes)

        def linknodes(filerevlog, fname):
            if fastpathlinkrev:
                ln, llr = filerevlog.node, filerevlog.linkrev
                def genfilenodes():
                    for r in filerevlog:
                        linkrev = llr(r)
                        if linkrev in needed:
                            yield filerevlog.node(r), cl.node(linkrev)