largefiles: don't attempt to clone all largefiles to non-local destinations

hgweb: fix filediff base calculation Previously, we were finding the most recent version of a file in a changeset and comparing it against its first file parent. This was wrong on three counts: - it would show a diff in revisions where there was no change to a file - it would show a diff when only the exec bit changed - it would potentially compare against a much older changeset, which could be very expensive if git-style rename detection was enabled This compares the file in the current context with that context's parent, which may result in an empty diff when looking at a file not touched by the current changeset.

branches: improve performance by removing redundant operations This refactors the branches command so it collects all the information it needs about a branch in one pass over the branch map. In particular, it fixes an issue where the command called repo.branchtags() to get branch tips, and then used repo.branchheads() to get the closed/open status. Both repo methods read the changelog to determine if the branch is closed, resulting in extra, redundant I/O. For the PyPy repo with 744 branches and 843 branch heads, this brings hg branches over NFS from: CallCount Recursive Total(ms) Inline(ms) module:lineno(function) 2427 0 0.9057 0.9057 <open> 2424 0 0.4096 0.4096 <method 'close' of 'file' objects> 2424 0 0.0476 0.0476 <method 'read' of 'file' objects> 1 0 0.0468 0.0468 mercurial.revlog:637(headrevs) +1 0 0.0000 0.0000 +<len> 2422 0 0.0443 0.0443 <method 'seek' of 'file' objects> 2962 0 0.0337 0.0337 <zlib.decompress> 2491 0 1.8008 0.0322 mercurial.changelog:182(read) +2491 0 1.6982 0.0315 +mercurial.revlog:881(revision) +2488 0 0.0269 0.0134 +mercurial.changelog:28(decodeextra) +4982 0 0.0085 0.0085 +<method 'split' of 'str' objects> +4982 0 0.0274 0.0049 +mercurial.encoding:61(tolocal) +2491 0 0.0039 0.0039 +<method 'index' of 'str' objects> 2491 0 1.6982 0.0315 mercurial.revlog:881(revision) +2413 0 0.0112 0.0112 +mercurial.revlog:305(rev) +2491 0 1.5315 0.0068 +mercurial.revlog:847(_chunkraw) +2491 0 0.0414 0.0058 +mercurial.revlog:945(_checkhash) +2491 0 0.0028 0.0028 +mercurial.revlog:349(flags) +2491 0 0.0025 0.0025 +<mercurial.mpatch.patches> 2422 0 1.5089 0.0286 mercurial.revlog:818(_loadchunk) +2422 0 0.4093 0.4093 +<method 'close' of 'file' objects> +2422 0 0.0451 0.0451 +<method 'read' of 'file' objects> +2422 0 0.0443 0.0443 +<method 'seek' of 'file' objects> +2422 0 0.9703 0.0096 +mercurial.store:374(__call__) +2422 0 0.0079 0.0069 +mercurial.revlog:810(_addchunk) 5804 0 0.0204 0.0204 mercurial.revlog:305(rev) 2426 0 0.9552 0.0177 mercurial.scmutil:218(__call__) +2426 0 0.9057 0.9057 +<open> +2426 0 0.0120 0.0083 +os.path:80(split) +2426 0 0.0061 0.0049 +mercurial.scmutil:92(__call__) Time: real 1.950 secs (user 0.560+0.000 sys 0.220+0.000) down to: CallCount Recursive Total(ms) Inline(ms) module:lineno(function) 1545 0 0.6035 0.6035 <open> 1542 0 0.2697 0.2697 <method 'close' of 'file' objects> 1 0 0.0547 0.0547 mercurial.revlog:637(headrevs) +1 0 0.0000 0.0000 +<len> 1542 0 0.0389 0.0389 <method 'read' of 'file' objects> 1540 0 0.0316 0.0316 <method 'seek' of 'file' objects> 1853 0 0.0227 0.0227 <zlib.decompress> 1557 0 1.2131 0.0226 mercurial.changelog:182(read) +1557 0 1.1398 0.0221 +mercurial.revlog:881(revision) +1555 0 0.0199 0.0094 +mercurial.changelog:28(decodeextra) +3114 0 0.0058 0.0058 +<method 'split' of 'str' objects> +3114 0 0.0196 0.0035 +mercurial.encoding:61(tolocal) +1557 0 0.0026 0.0026 +<method 'index' of 'str' objects> 1557 0 1.1398 0.0221 mercurial.revlog:881(revision) +1557 0 1.0307 0.0047 +mercurial.revlog:847(_chunkraw) +1557 0 0.0287 0.0040 +mercurial.revlog:945(_checkhash) +1557 0 0.0018 0.0018 +<mercurial.mpatch.patches> +1557 0 0.0018 0.0018 +mercurial.revlog:326(node) +1557 0 0.0417 0.0013 +mercurial.revlog:857(_chunkbase) 1540 0 1.0147 0.0210 mercurial.revlog:818(_loadchunk) +1540 0 0.2693 0.2693 +<method 'close' of 'file' objects> +1540 0 0.0360 0.0360 +<method 'read' of 'file' objects> +1540 0 0.0316 0.0316 +<method 'seek' of 'file' objects> +1540 0 0.6487 0.0070 +mercurial.store:374(__call__) +1540 0 0.0059 0.0052 +mercurial.revlog:810(_addchunk) 3192 0 0.0173 0.0173 mercurial.revlog:305(rev) 8184 0 0.0300 0.0147 <method 'decode' of 'str' objects> +5204 0 0.0149 0.0048 +encodings.utf_8:15(decode) +1 0 0.0004 0.0000 +encodings:71(search_function) 43 26 0.0147 0.0129 <__import__> Time: real 1.390 secs (user 0.450+0.000 sys 0.170+0.000)