D. Ben Knoble 1d6da55858 core: convert build-time USE_NSEC into runtime core.useNanosec ... Racy Git problems persist today, manifesting themselves in the performance of commands like "git diff" in new worktrees [1]. We have long had a build knob "USE_NSEC" to tell Git to use in-core nanosecond precision when available, which mitigates most if not all racy issues, but most builds we know about don't use it. In part, that's because someone distributing Git can't safely enable it at compile-time if they don't know exactly what platforms their distribution will be used on. [1]: https://lore.kernel.org/git/CALnO6CADMJSixqYvL1Yo8qKX5rWhKQ+2OoSEuPUh-yoeK9TseQ@mail.gmail.com These days, most platforms are likely to be safe for the USE_NSEC code. Regardless, we want to give users the ability to benefit from it. This requires exposing the compile-time gated code as a runtime option. In addition, update the Racy Git documentation and other mentions of USE_NSEC in the code. Due to the conversion from #ifdef to runtime check, using the flag "--ignore-space-change" may be particularly helpful when viewing changes from this patch. Signed-off-by: D. Ben Knoble <ben.knoble@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>		2026-08-31 13:48:44 -07:00
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add.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
advice.adoc	Merge branch 'hn/branch-push-slip-advice'	2026-07-13 08:27:27 -07:00
alias.adoc	doc: fix list continuation in alias.adoc	2026-03-03 09:59:31 -08:00
am.adoc	doc: convert git-am synopsis and options to new style	2026-05-25 20:05:44 +09:00
apply.adoc	doc: convert git-apply synopsis and options to new style	2026-05-25 20:05:44 +09:00
attr.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
bitmap-pseudo-merge.adoc	pack-bitmap: reject pseudo-merge "sampleRate" of 0	2026-05-12 10:36:18 +09:00
blame.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
branch.adoc	remote: find tracking branches for URL push destinations	2026-07-22 11:29:49 -07:00
browser.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
bundle.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
checkout.adoc	doc: convert git-checkout manpage to new style	2025-05-27 07:50:58 -07:00
clean.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
clone.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
color.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
column.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
commit.adoc	doc: config: mention core.commentChar on commit.cleanup	2025-05-27 15:31:06 -07:00
commitgraph.adoc	commit-graph: add new config for changed-paths & recommend it in scalar	2025-10-22 10:40:11 -07:00
completion.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
core.adoc	core: convert build-time USE_NSEC into runtime core.useNanosec	2026-08-31 13:48:44 -07:00
credential.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
diff.adoc	Merge branch 'bc/doc-adoc-not-txt'	2025-02-14 17:53:47 -08:00
difftool.adoc	doc: convert git-difftool manual page to synopsis style	2026-04-06 09:38:18 -07:00
extensions.adoc	Merge branch 'kn/ref-location'	2026-03-04 10:52:59 -08:00
fastimport.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
feature.adoc	setup: use "reftable" format when experimental features are enabled	2025-07-07 06:26:21 -07:00
fetch.adoc	fetch: add configuration variable fetch.followRemoteHEAD	2026-06-19 09:19:36 -07:00
filter.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
fmt-merge-msg.adoc	doc: switch merge config description to new synopsis format	2025-05-27 07:51:00 -07:00
format.adoc	Fix docs for format.commitListFormat	2026-04-22 16:16:24 -07:00
fsck.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
fsmonitor--daemon.adoc	fsmonitor: implement filesystem change listener for Linux	2026-04-15 08:44:33 -07:00
gc.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
gitcvs.adoc	completion: make sed command that generates config-list.h portable.	2025-06-02 17:21:49 -07:00
gitweb.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
gpg.adoc	gpg-interface: expand gpg.program as a path	2025-07-14 10:07:02 -07:00
grep.adoc	doc: convert git-grep synopsis and options to new style	2026-05-25 20:05:44 +09:00
gui.adoc	config: document 'gui.GCWarning'	2025-12-09 07:38:56 +09:00
guitool.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
help.adoc	Merge branch 'bc/doc-adoc-not-txt'	2025-02-14 17:53:47 -08:00
hook.adoc	doc: hook: don’t self-link via config include	2026-05-22 09:36:20 +09:00
http.adoc	doc: clarify http.emptyAuth values	2026-05-01 14:01:57 +09:00
i18n.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
imap.adoc	doc: convert git-imap-send synopsis and options to new style	2026-05-25 20:05:45 +09:00
includeif.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
index.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
init.adoc	submodule: allow runtime enabling extensions.submodulePathConfig	2026-01-12 11:56:56 -08:00
instaweb.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
interactive.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
log.adoc	graph: add --[no-]graph-indent and log.graphIndent	2026-07-14 07:32:51 -07:00
lsrefs.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
mailinfo.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
mailmap.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
maintenance.adoc	builtin/maintenance: use "geometric" strategy by default	2026-02-24 07:33:20 -08:00
man.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
merge.adoc	merge/pull: extend merge.stat configuration variable to cover --compact-summary	2025-06-13 11:54:14 -07:00
mergetool.adoc	doc: convert git-difftool manual page to synopsis style	2026-04-06 09:38:18 -07:00
notes.adoc	Merge branch 'bc/doc-adoc-not-txt'	2025-02-14 17:53:47 -08:00
pack.adoc	doc: fix plural agreement in pack.preferBitmapTips	2026-04-16 21:22:01 -07:00
pager.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
pretty.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
promisor.adoc	Merge branch 'cc/promisor-auto-config-url-more'	2026-07-06 15:50:19 -07:00
protocol.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
pull.adoc	pull: add pull.autoStash config option	2025-07-21 15:01:21 -07:00
push.adoc	doc: clarify push.default=simple behavior	2026-05-26 20:11:29 +09:00
rebase.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
receive.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
reftable.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
remote.adoc	Merge branch 'mh/fetch-follow-remote-head-config'	2026-07-06 15:50:22 -07:00
remotes.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
repack.adoc	repack: introduce `--write-midx=incremental`	2026-05-20 11:31:14 +09:00
replay.adoc	replay: add replay.refAction config option	2025-11-05 13:34:55 -08:00
rerere.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
revert.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
safe.adoc	Merge branch 'ta/doc-config-adoc-fixes'	2026-06-17 11:10:11 -07:00
sendemail.adoc	doc: fix self-referential config in sendemail.smtpSSLClientKey	2026-04-16 21:22:01 -07:00
sequencer.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
showbranch.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
sideband.adoc	Merge branch 'ta/doc-config-adoc-fixes'	2026-06-17 11:10:11 -07:00
sparse.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
splitindex.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
ssh.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
stash.adoc	Merge branch 'dk/stash-apply-index'	2025-10-20 14:12:17 -07:00
status.adoc	status: clarify how status.compareBranches deduplicates	2026-03-04 10:13:33 -08:00
submodule.adoc	doc: fix grammar errors in submodule description	2026-04-16 21:22:01 -07:00
tag.adoc	doc: convert git tag to synopsis style	2025-10-05 16:09:03 -07:00
tar.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
trace2.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
trailer.adoc	doc: config: convert trailers section to synopsis style	2026-03-16 15:04:37 -07:00
transfer.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
uploadarchive.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
uploadpack.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
url.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
user.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
versionsort.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
web.adoc	doc: use .adoc extension for AsciiDoc files	2025-01-21 12:56:06 -08:00
worktree.adoc	doc: convert git worktree to synopsis style	2025-10-05 16:09:03 -07:00