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Kaushik Lingarkar 303dd019d1 Optimize RefDirectory.isNameConflicting() Avoid having to scan over ALL loose refs to determine if the name is nested within or is a container of an existing reference. This can get really expensive if there are too many loose refs. Instead use exactRef and getRefsByPrefix which scan based on a prefix. With a simple shell script(like below) using jgit client to create 1k refs in a new repository on NFS, this change brings down the time from 12mins to 7mins. for ref in $(seq 1 1000); do jgit branch "$ref" done Here are few recorded elapsed times to create a new branch on NFS based repositories with varying loose refs count. As we see here, this change improves the name conflicting check from O(n^2) to O(1). loose_refs_count with_change without_change 50 44 ms 164 ms 300 45 ms 1193 ms 1k 38 ms 2610 ms 2k 44 ms 6003 ms 9k 46 ms 27860 ms 20k 45 ms 48591 ms 50k 51 ms 135471 ms 110k 43 ms 294252 ms 160k 52 ms 430976 ms Change-Id: Ie994fc184b8f82811bfb37b111eb9733dbe3e6e0 Signed-off-by: Kaushik Lingarkar <quic_kaushikl@quicinc.com>		pirms 3 gadiem
..
annotations	Revert usage of TYPE_USE in Nullable and NonNull annotations	pirms 6 gadiem
api	Fix copy-paste typo in CloneCommand#cleanup	pirms 4 gadiem
attributes	Deprecate Constants.CHARSET in favor of StandardCharsets.UTF_8	pirms 5 gadiem
blame	Fix API breakage introduced by da254106	pirms 5 gadiem
diff	Use the same default diff.renameLimit = 400 like native git	pirms 5 gadiem
dircache	Avoid sign extension when comparing mtime with Instant#getEpochSecond	pirms 4 gadiem
errors	Merge branch 'stable-4.11' into stable-5.0	pirms 5 gadiem
events	Store in IndexChangedEvent if it was caused by JGit itself	pirms 6 gadiem
fnmatch	Remove further unnecessary 'final' keywords	pirms 6 gadiem
gitrepo	RepoText: Remove unused externalized string	pirms 4 gadiem
hooks	Deprecate Constants.CHARSET in favor of StandardCharsets.UTF_8	pirms 5 gadiem
ignore	Deprecate Constants.CHARSET in favor of StandardCharsets.UTF_8	pirms 5 gadiem
internal	Optimize RefDirectory.isNameConflicting()	pirms 3 gadiem
lib	Remove unused imports	pirms 3 gadiem
merge	Stop using deprecated Constants.CHARACTER_ENCODING	pirms 4 gadiem
nls	Don't subclass ThreadLocal to avoid memory leak in NLS	pirms 6 gadiem
notes	Remove 'final' in parameter lists	pirms 6 gadiem
patch	Deprecate Constants.CHARSET in favor of StandardCharsets.UTF_8	pirms 5 gadiem
revplot	refactor: simplify collection.toArray()	pirms 5 gadiem
revwalk	Parse signature of GPG-signed commits	pirms 5 gadiem
storage	WindowCache: add metric for cached bytes per repository	pirms 4 gadiem
submodule	Remove 'final' in parameter lists	pirms 6 gadiem
transport	JschConfigSessionFactory: fix boxing warning	pirms 4 gadiem
treewalk	Replace usage of ArrayIndexOutOfBoundsException in treewalk	pirms 4 gadiem
util	SshSupport#runSshCommand: don't throw exception in finally block	pirms 4 gadiem