t / perf / p0006-read-tree-checkout.shon commit sha1_file: restore OBJECT_INFO_QUICK functionality (2b7750c)
   1#!/bin/sh
   2#
   3# This test measures the performance of various read-tree
   4# and checkout operations.  It is primarily interested in
   5# the algorithmic costs of index operations and recursive
   6# tree traversal -- and NOT disk I/O on thousands of files.
   7
   8test_description="Tests performance of read-tree"
   9
  10. ./perf-lib.sh
  11
  12test_perf_default_repo
  13
  14# If the test repo was generated by ./repos/many-files.sh
  15# then we know something about the data shape and branches,
  16# so we can isolate testing to the ballast-related commits
  17# and setup sparse-checkout so we don't have to populate
  18# the ballast files and directories.
  19#
  20# Otherwise, we make some general assumptions about the
  21# repo and consider the entire history of the current
  22# branch to be the ballast.
  23
  24test_expect_success "setup repo" '
  25        if git rev-parse --verify refs/heads/p0006-ballast^{commit}
  26        then
  27                echo Assuming synthetic repo from many-files.sh
  28                git branch br_base            master
  29                git branch br_ballast         p0006-ballast^
  30                git branch br_ballast_alias   p0006-ballast^
  31                git branch br_ballast_plus_1  p0006-ballast
  32                git config --local core.sparsecheckout 1
  33                cat >.git/info/sparse-checkout <<-EOF
  34                /*
  35                !ballast/*
  36                EOF
  37        else
  38                echo Assuming non-synthetic repo...
  39                git branch br_base            $(git rev-list HEAD | tail -n 1)
  40                git branch br_ballast         HEAD^ || error "no ancestor commit from current head"
  41                git branch br_ballast_alias   HEAD^
  42                git branch br_ballast_plus_1  HEAD
  43        fi &&
  44        git checkout -q br_ballast &&
  45        nr_files=$(git ls-files | wc -l)
  46'
  47
  48test_perf "read-tree br_base br_ballast ($nr_files)" '
  49        git read-tree -m br_base br_ballast -n
  50'
  51
  52test_perf "switch between br_base br_ballast ($nr_files)" '
  53        git checkout -q br_base &&
  54        git checkout -q br_ballast
  55'
  56
  57test_perf "switch between br_ballast br_ballast_plus_1 ($nr_files)" '
  58        git checkout -q br_ballast_plus_1 &&
  59        git checkout -q br_ballast
  60'
  61
  62test_perf "switch between aliases ($nr_files)" '
  63        git checkout -q br_ballast_alias &&
  64        git checkout -q br_ballast
  65'
  66
  67test_done