Optimize manifest.add Testing shows that manifest.add is spending a significant percentage of its time running calcoffsets and doing text = "".join(addlist). This patch removes the need for both of these by storying the manifest in a character array, and using a modified bisect search to find lines without the help of a separate index of line offsets. manifest.add was also reworked to push delta construction/combination into the main loop. Time to apply 2751 patches (without psyco, ext3 noatime,data=writeback): Stock hg: 4m45s real 3m32s user 55s sys patched: 2m48s real 1m53s user 43s sys quilt: 2m30s real 45s user 50s sys (quilt does much more io...)

Reduce string duplication in compression code This cuts down on string copies and allows buffers (instead of strings) to be passed into the compression code

reset mtime when two files are equal

add localrepo.wlock for protecting the dirstate - add localrepo.wlock - nest it in localrepo.lock - protect the code that change the dirstate

add a releasefn keyword to lock.lock releasefn is a function that will be executed when the lock is released

add dirstate.lazyread, write atomically the dirstate - add a dirstate.lazyread function that read only if it wasn't read before and update all callers - use the atomic keyword from util.opener to atomically write the dirstate mercurial/dirstate.py

add an atomic argument to util.opener when atomic is used, the file while be renamed on close

don't print anything about file of unsupported type unless the file was specified on the command line

fix a bug where command defaults suppress global options

Merge with TAH