cmdutil: satisfy expections in dirstateguard.__del__, even if __init__ fails Python "delstructors" are terrible - this one because it assumed that __init__ had completed before it was called. That would not necessarily be the case if the repository was read only or broken and saving the dirstate thus failed in unexpected ways. That could give confusing warnings about missing '_active' after failures. To fix that, make sure all member variables are "declared" before doing anything that possibly could fail. [Famous last words.]

util: increase filechunkiter size to 128k util.filechunkiter has been using a chunk size of 64k for more than 10 years, also in years where Moore's law still was a law. It is probably ok to bump it now and perhaps get a slight win in some cases. Also, largefiles have been using 128k for a long time. Specifying that size multiple times (or forgetting to do it) seems a bit stupid. Decreasing it to 64k also seems unfortunate. Thus, we will set the default chunksize to 128k and use the default everywhere.

largefiles: always use filechunkiter when iterating files Before, we would sometimes use the default iterator over large files. That iterator is line based and would add extra buffering and use odd chunk sizes which could give some overhead. copyandhash can't just apply a filechunkiter as it sometimes is passed a genuine generator when downloading remotely.