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Derrick Stolee d76723ee53 status: use sparse-index throughout 
By testing 'git -c core.fsmonitor= status -uno', we can check for the
simplest index operations that can be made sparse-aware. The necessary
implementation details are already integrated with sparse-checkout, so
modify command_requires_full_index to be zero for cmd_status().

In refresh_index(), we loop through the index entries to refresh their
stat() information. However, sparse directories have no stat()
information to populate. Ignore these entries.

This allows 'git status' to no longer expand a sparse index to a full
one. This is further tested by dropping the "-uno" option and adding an
untracked file into the worktree.

The performance test p2000-sparse-checkout-operations.sh demonstrates
these improvements:

Test                                  HEAD~1           HEAD
-----------------------------------------------------------------------------
2000.2: git status (full-index-v3)    0.31(0.30+0.05)  0.31(0.29+0.06) +0.0%
2000.3: git status (full-index-v4)    0.31(0.29+0.07)  0.34(0.30+0.08) +9.7%
2000.4: git status (sparse-index-v3)  2.35(2.28+0.10)  0.04(0.04+0.05) -98.3%
2000.5: git status (sparse-index-v4)  2.35(2.24+0.15)  0.05(0.04+0.06) -97.9%

Note that since HEAD~1 was expanding the sparse index by parsing trees,
it was artificially slower than the full index case. Thus, the 98%
improvement is misleading, and instead we should celebrate the 0.34s to
0.05s improvement of 85%. This is more indicative of the peformance
gains we are expecting by using a sparse index.

Note: we are dropping the assignment of core.fsmonitor here. This is not
necessary for the test script as we are not altering the config any
other way. Correct integration with FS Monitor will be validated in
later changes.

Reviewed-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-07-14 13:42:49 -07:00
..
add.c Merge branch 'ow/no-dryrun-in-add-i' 2021-05-14 08:26:09 +09:00
am.c am: learn to process quoted lines that ends with CRLF 2021-05-10 15:06:22 +09:00
annotate.c strvec: rename struct fields 2020-07-30 19:18:06 -07:00
apply.c
archive.c
bisect--helper.c bisect--helper: use BISECT_TERMS in 'bisect skip' command 2021-04-30 09:56:42 +09:00
blame.c Merge branch 'rs/blame-optim' 2021-02-25 16:43:29 -08:00
branch.c ref-filter: reuse output buffer 2021-04-20 11:09:50 -07:00
bugreport.c builtin/bugreport: don't leak prefixed filename 2021-04-28 09:25:45 +09:00
bundle.c Merge branch 'bc/sha-256-part-3' 2020-08-11 18:04:11 -07:00
cat-file.c
check-attr.c
check-ignore.c Merge branch 'ah/plugleaks' 2021-05-07 12:47:41 +09:00
check-mailmap.c shortlog: remove unused(?) "repo-abbrev" feature 2021-01-12 14:04:42 -08:00
check-ref-format.c
checkout--worker.c make_transient_cache_entry(): optionally alloc from mem_pool 2021-05-05 12:25:25 +09:00
checkout-index.c Merge branch 'mt/parallel-checkout-part-3' 2021-05-16 21:05:23 +09:00
checkout.c Merge branch 'mt/parallel-checkout-part-3' 2021-05-16 21:05:23 +09:00
clean.c Merge branch 'en/dir-traversal' 2021-05-20 08:54:59 +09:00
clone.c Merge branch 'jk/clone-clean-upon-transport-error' 2021-06-14 13:33:26 +09:00
column.c column, range-diff: downcase option description 2021-03-29 14:06:08 -07:00
commit-graph.c builtin/*: update usage format 2021-01-06 15:10:49 -08:00
commit-tree.c
commit.c status: use sparse-index throughout 2021-07-14 13:42:49 -07:00
config.c config: unify code paths to get global config paths 2021-04-19 14:16:59 -07:00
count-objects.c
credential-cache--daemon.c unix-socket: add backlog size option to unix_stream_listen() 2021-03-15 14:32:51 -07:00
credential-cache.c unix-socket: disallow chdir() when creating unix domain sockets 2021-03-15 14:32:51 -07:00
credential-store.c crendential-store: use timeout when locking file 2020-11-25 12:30:18 -08:00
credential.c credential: load default config 2020-10-16 12:30:45 -07:00
describe.c hash: provide per-algorithm null OIDs 2021-04-27 16:31:39 +09:00
diff-files.c Merge branch 'jc/diffcore-rotate' 2021-02-25 16:43:30 -08:00
diff-index.c diff-merges: move specific diff-index "-m" handling to diff-index 2021-05-21 09:24:14 +09:00
diff-tree.c Merge branch 'jc/diffcore-rotate' 2021-02-25 16:43:30 -08:00
diff.c hash: provide per-algorithm null OIDs 2021-04-27 16:31:39 +09:00
difftool.c Merge branch 'mt/parallel-checkout-part-3' 2021-05-16 21:05:23 +09:00
env--helper.c assert PARSE_OPT_NONEG in parse-options callbacks 2020-09-30 12:53:47 -07:00
fast-export.c hash: provide per-algorithm null OIDs 2021-04-27 16:31:39 +09:00
fast-import.c Use the final_oid_fn to finalize hashing of object IDs 2021-04-27 16:31:38 +09:00
fetch-pack.c connect, transport: encapsulate arg in struct 2021-02-05 13:49:54 -08:00
fetch.c fetch: improve grammar of "shallow roots" message 2021-05-20 13:36:33 +09:00
fmt-merge-msg.c
for-each-ref.c Merge branch 'ah/plugleaks' 2021-05-07 12:47:41 +09:00
for-each-repo.c for-each-repo: do nothing on empty config 2021-01-07 19:12:02 -08:00
fsck.c Merge branch 'ab/fsck-api-cleanup' 2021-06-02 07:34:27 +09:00
gc.c maintenance: fix two memory leaks 2021-05-12 07:00:45 +09:00
get-tar-commit-id.c
grep.c Merge branch 'bc/hash-transition-interop-part-1' 2021-05-10 16:59:46 +09:00
hash-object.c
help.c help: drop usage of 'common' and 'useful' for guides 2020-08-04 18:34:01 -07:00
index-pack.c Use the final_oid_fn to finalize hashing of object IDs 2021-04-27 16:31:38 +09:00
init-db.c Merge branch 'mt/init-template-userpath-fix' 2021-05-25 16:21:20 +09:00
interpret-trailers.c
log.c Merge branch 'so/log-diff-merge' 2021-04-30 13:50:26 +09:00
ls-files.c Merge branch 'en/dir-traversal' 2021-05-20 08:54:59 +09:00
ls-remote.c Merge branch 'ah/plugleaks' 2021-04-07 16:54:08 -07:00
ls-tree.c tree.h API: simplify read_tree_recursive() signature 2021-03-20 16:09:26 -07:00
mailinfo.c mailinfo: allow squelching quoted CRLF warning 2021-05-10 15:06:22 +09:00
mailsplit.c
merge-base.c
merge-file.c
merge-index.c merge-index: ensure full index 2021-04-14 13:47:21 -07:00
merge-ours.c
merge-recursive.c
merge-tree.c merge-base, xdiff: zero out xpparam_t structures 2020-10-20 12:53:26 -07:00
merge.c Merge branch 'ah/merge-usage-i18n-fix' 2021-06-10 12:04:23 +09:00
mktag.c fsck.c: add an fsck_set_msg_type() API that takes enums 2021-03-28 19:03:10 -07:00
mktree.c
multi-pack-index.c midx: allow marking a pack as preferred 2021-04-01 13:07:37 -07:00
mv.c git mv foo FOO ; git mv foo bar gave an assert 2021-03-03 17:07:12 -08:00
name-rev.c oid_pos(): access table through const pointers 2021-01-28 12:03:26 -08:00
notes.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
pack-objects.c Merge branch 'ab/pack-linkage-fix' 2021-05-27 12:36:58 +09:00
pack-redundant.c builtin/pack-redundant: avoid casting buffers to struct object_id 2021-04-27 16:31:38 +09:00
pack-refs.c
patch-id.c
prune-packed.c
prune.c
pull.c pull: display default warning only when non-ff 2020-12-15 17:39:42 -08:00
push.c Merge branch 'jc/push-delete-nothing' 2021-02-25 16:43:33 -08:00
range-diff.c column, range-diff: downcase option description 2021-03-29 14:06:08 -07:00
read-tree.c
rebase.c Merge branch 'bc/hash-transition-interop-part-1' 2021-05-10 16:59:46 +09:00
receive-pack.c hash: provide per-algorithm null OIDs 2021-04-27 16:31:39 +09:00
reflog.c reflog expire --stale-fix: be generous about missing objects 2021-02-11 09:21:52 -08:00
remote-ext.c strvec: convert builtin/ callers away from argv_array name 2020-07-28 15:02:18 -07:00
remote-fd.c
remote.c Merge branch 'ah/plugleaks' 2021-04-07 16:54:08 -07:00
repack.c repack: avoid loosening promisor objects in partial clones 2021-04-28 13:36:13 +09:00
replace.c strvec: rename struct fields 2020-07-30 19:18:06 -07:00
rerere.c
reset.c reset: free instead of leaking unneeded ref 2021-03-14 15:57:59 -07:00
rev-list.c rev-list: allow filtering of provided items 2021-04-19 14:09:11 -07:00
rev-parse.c rev-parse: mark die() messages for translation 2021-05-17 18:39:53 +09:00
revert.c sequencer: fix edit handling for cherry-pick and revert messages 2021-03-31 14:10:50 -07:00
rm.c Merge branch 'ah/plugleaks' 2021-05-07 12:47:41 +09:00
send-pack.c push: parse and set flag for "--force-if-includes" 2020-10-03 09:59:19 -07:00
shortlog.c Merge branch 'ab/mailmap' 2021-01-25 14:19:19 -08:00
show-branch.c Merge branch 'jt/interpret-branch-name-fallback' 2020-09-09 13:53:09 -07:00
show-index.c builtin/show-index: set the algorithm for object IDs 2021-04-27 16:31:39 +09:00
show-ref.c refs: switch peel_ref() to peel_iterated_oid() 2021-01-21 15:51:31 -08:00
sparse-checkout.c Merge branch 'ds/sparse-index-protections' 2021-04-30 13:50:26 +09:00
stash.c Merge branch 'so/log-m-implies-p' 2021-06-14 13:33:27 +09:00
stripspace.c
submodule--helper.c Merge branch 'ah/submodule-helper-module-summary-parseopt' 2021-06-10 12:04:24 +09:00
symbolic-ref.c symbolic-ref: don't leak shortened refname in check_symref() 2021-03-14 15:57:59 -07:00
tag.c ref-filter: reuse output buffer 2021-04-20 11:09:50 -07:00
unpack-file.c
unpack-objects.c hash: provide per-algorithm null OIDs 2021-04-27 16:31:39 +09:00
update-index.c update-index: ensure full index 2021-04-14 13:47:29 -07:00
update-ref.c update-ref: disallow "start" for ongoing transactions 2020-11-16 13:44:01 -08:00
update-server-info.c
upload-archive.c strvec: rename struct fields 2020-07-30 19:18:06 -07:00
upload-pack.c
var.c
verify-commit.c
verify-pack.c Merge branch 'bc/sha-256-part-3' 2020-08-11 18:04:11 -07:00
verify-tag.c
worktree.c Merge branch 'en/dir-traversal' 2021-05-20 08:54:59 +09:00
write-tree.c