speed up hg log --patch Changing dodiff to read the manifest/changelog for node1 before calling repo.update allows us to take advantage of the revlog revision cache. Before this patch and my previous "speed up hg log --debug" patch, when using hg log -p to display three revisions (A, B and C), dodiff and repo.changes would end up reading the manifests in this order: B A B A C B C B With both patches, this order becomes: A A B B B B C C (This considers only dodiff and repo.changes. I'm not sure how other parts of hg log enter the picture.) The speed up will depend on the revisions being displayed. (All "before" times already have my previous "speed up hg log --debug" patch applied.) hg repo (tip = 414e81ae971f). hg log -p before after real 0m50.981s 0m45.279s user 0m47.930s 0m42.560s sys 0m2.526s 0m2.523s output size: 6917897 bytes kernel repo (tip = 9d4e135960ed). hg log -p -l64 before after real 2m14.995s 1m45.025s user 2m9.509s 1m33.900s sys 0m3.663s 0m2.942s output size: 31497621 bytes same kernel repo. hg log -p -l64 -r c84c2069592f:0 before after real 1m48.045s 1m0.076s user 1m44.094s 0m58.492s sys 0m2.603s 0m1.103s output size: 197983 bytes c84c2069592f was the tip of a 10 day old kernel repo that I had lying around and was where I first tested this patch. For some weird coincidence it's also a place where the patch makes a huge difference.

     1

Main should be gone

     2

a

     3

changeset:   3:91ebc10ed028

     4

tag:         tip

     5

user:        test

     6

date:        Thu Jan  1 00:00:00 1970 +0000

     7

summary:     Added side2

     8

     9

changeset:   2:b932d7dbb1e1

    10

parent:      0:c2eda428b523

    11

user:        test

    12

date:        Thu Jan  1 00:00:00 1970 +0000

    13

summary:     Added side1

    14

    15

changeset:   1:71a760306caf

    16

user:        test

    17

date:        Thu Jan  1 00:00:00 1970 +0000

    18

summary:     Added main

    19

    20

changeset:   0:c2eda428b523

    21

user:        test

    22

date:        Thu Jan  1 00:00:00 1970 +0000

    23

summary:     Added a

    24

    25

Should have two heads, side2 and main

    26

changeset:   3:91ebc10ed028

    27

tag:         tip

    28

user:        test

    29

date:        Thu Jan  1 00:00:00 1970 +0000

    30

summary:     Added side2

    31

    32

changeset:   1:71a760306caf

    33

user:        test

    34

date:        Thu Jan  1 00:00:00 1970 +0000

    35

summary:     Added main

    36

    37

Should show a side1 side2

    38

a

    39

side1

    40

side2

    41

resolving manifests

    42

 force 1 allow None moddirstate True linear False

    43

 ancestor 8515d4bfda76 local 1c0f48f8ece6 remote 0594b9004bae

    44

remote deleted side2, clobbering

    45

remote deleted side1, clobbering

    46

remote created main

    47

getting main

    48

removing side1

    49

removing side2

    50

Should only show a main

    51

a

    52

main