demandimport: fix level passed to loader of sub-modules As the fromlist gives the names of sub-modules, they should be searched in the parent directory of the package's __init__.py, which is level=1. I got the following error by rewriting hgweb to use absolute_import, where the "mercurial" package is referenced as ".." (level=2): ValueError: Attempted relative import beyond toplevel package I know little about the import mechanism, but this change seems correct. Before this patch, the following code did import the os module with no error: from mercurial import demandimport demandimport.enable() from mercurial import os print os.name

parsers: fix width of datalen variable in fm1readmarkers Because parsers.c does not define PY_SSIZE_T_CLEAN, "s#" format requires (const char*, int), not (const char*, Py_ssize_t). https://docs.python.org/2/c-api/arg.html This error had no problem before 042344313939, where datalen wasn't used. But now fm1readmarkers() fails with "overflow in obsstore" on Python 2.6.9 (amd64) because upper bits of datalen seem to be filled with 1, making it a negative integer. This problem seems not visible on our Python 2.7 environment because upper bits happen to be filled with 0.

manifest: skip fastdelta if the change is large In large repos, the existing manifest fastdelta computation (which performs a bisect on the raw manifest for every file that is changing), is excessively slow. This patch makes fastdelta fallback to the normal string delta algorithm if the number of changes is large. On a large repo with a commit of 8000 files, this reduces the commit time by 7 seconds (fastdelta goes from 8 seconds to 1). I tested this change by modifying the function to compare the old and the new values and running the test suite. The only difference is that the pure text-diff algorithm sometimes produces smaller (but functionaly identical) deltatexts than the bisect algorithm.