sparse-revlog: add a test checking revlog deltas for a churning file The test repository contains 5000 revisions and is therefore slow to build: five minutes with CHG, over fifteen minutes without. It is too slow to build during the test. Bundling all content produce a sizeable result, 20BM, too large to be committed. Instead, we commit a script to build the expected bundle and the test checks if the bundle is available. Any run of the script will produce the same repository content, using resulting in the same hashes. Using smaller repositories was tried, however, it misses most of the cases we are planning to improve. Having them in a 5000 repository is already nice, we usually see these case in repositories in the order of magnitude of one million revisions. This test will be very useful to check various changes strategy for building delta to store in a sparse-revlog. In this series we will focus our attention on the following metrics: The ones that will impact the final storage performance (size, space): * size of the revlog data file (".hg/store/data/*.d") * chain length info The ones that describe the deltas patterns: * number of snapshot revision (and their level) * size taken by snapshot revision (and their level)

     1

syntax: glob

     2

     3

*.elc

     4

*.tmp

     5

*.orig

     6

*.rej

     7

*~

     8

*.mergebackup

     9

*.o

    10

*.so

    11

*.dll

    12

*.exe

    13

*.pyd

    14

*.pyc

    15

*.pyo

    16

*$py.class

    17

*.swp

    18

*.prof

    19

*.zip

    20

\#*\#

    21

.\#*

    22

tests/artifacts/cache/big-file-churn.hg

    23

tests/.coverage*

    24

tests/.testtimes*

    25

tests/.hypothesis

    26

tests/hypothesis-generated

    27

tests/annotated

    28

tests/exceptions

    29

tests/*.err

    30

tests/htmlcov

    31

build

    32

contrib/chg/chg

    33

contrib/hgsh/hgsh

    34

contrib/vagrant/.vagrant

    35

dist

    36

packages

    37

doc/common.txt

    38

doc/*.[0-9]

    39

doc/*.[0-9].txt

    40

doc/*.[0-9].gendoc.txt

    41

doc/*.[0-9].{x,ht}ml

    42

MANIFEST

    43

MANIFEST.in

    44

patches

    45

mercurial/__modulepolicy__.py

    46

mercurial/__version__.py

    47

mercurial/hgpythonlib.h

    48

mercurial.egg-info

    49

.DS_Store

    50

tags

    51

cscope.*

    52

.idea/*

    53

.asv/*

    54

i18n/hg.pot

    55

locale/*/LC_MESSAGES/hg.mo

    56

hgext/__index__.py

    57

    58

rust/target/

    59

    60

# Generated wheels

    61

wheelhouse/

    62

    63

syntax: regexp

    64

^\.pc/

    65

^\.(pydev)?project

    66

    67

# hackable windows distribution additions

    68

^hg-python

    69

^hg.py$