revlog: break up compression of large deltas
Python's zlib apparently makes an internal copy of strings passed to
compress(). To avoid this, compress strings 1M at a time, then join
them at the end if the result would be smaller than the original.
For initial commits of large but compressible files, this cuts peak
memory usage nearly in half.
1:f248da0d4c3e
0:9eca13a34789
f248da0d4c3e tip
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
9eca13a34789
9eca13a34789+
reverting file1
9eca13a34789
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
f248da0d4c3e tip
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
warning: conflicts during merge.
merging file1
merging file1 failed!
0 files updated, 0 files merged, 0 files removed, 1 files unresolved
There are unresolved merges with locally modified files.
You can redo the full merge using:
hg update 0
hg update 1
diff -r f248da0d4c3e file1
--- a/file1
+++ b/file1
@@ -1,3 +1,7 @@ added file1
added file1
another line of text
+<<<<<<< my
+changed file1 different
+=======
changed file1
+>>>>>>> other
M file1
f248da0d4c3e+ tip
reverting file1
f248da0d4c3e tip
f248da0d4c3e tip
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
f248da0d4c3e tip