Mercurial > jhg
diff src/org/tmatesoft/hg/internal/Metadata.java @ 694:7efabe0cddcf
Speed up (a) file rename history to minimize file reads; (b) file.isCopy(int) to read metadata for few revisions at once (use pattern assumes earlier revisions are likely to be queried, too); (c) HgIgnore.isIgnored by caching matched initial fragments (to substitute more expensive Matcher.matches with cheaper HashMap.contains)
| author | Artem Tikhomirov <tikhomirov.artem@gmail.com> |
|---|---|
| date | Mon, 05 Aug 2013 17:42:10 +0200 |
| parents | e3717fc7d26f |
| children |
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--- a/src/org/tmatesoft/hg/internal/Metadata.java Mon Aug 05 12:45:36 2013 +0200 +++ b/src/org/tmatesoft/hg/internal/Metadata.java Mon Aug 05 17:42:10 2013 +0200 @@ -16,6 +16,7 @@ */ package org.tmatesoft.hg.internal; +import static org.tmatesoft.hg.repo.HgRepository.NO_REVISION; import static org.tmatesoft.hg.util.LogFacility.Severity.Error; import java.io.ByteArrayOutputStream; @@ -50,18 +51,24 @@ private final Metadata.Record NONE = new Record(-1, null); // don't want statics private final LogFacility log; + + private int lastRevRead = NO_REVISION; public Metadata(SessionContext.Source sessionCtx) { log = sessionCtx.getSessionContext().getLog(); } - // true when there's metadata for given revision + /** + * @return <code>true</code> when there's metadata for given revision + */ public boolean known(int revision) { Metadata.Record i = entries.get(revision); return i != null && NONE != i; } - // true when revision has been checked for metadata presence. + /** + * @return <code>true</code> when revision has been checked for metadata presence. + */ public boolean checked(int revision) { return entries.containsKey(revision); } @@ -71,6 +78,14 @@ Metadata.Record i = entries.get(revision); return i == NONE; } + + /** + * Get the greatest revision index visited so far. + * Note, doesn't imply all revisions up to this has been visited. + */ + public int lastRevisionRead() { + return lastRevRead; + } // mark revision as having no metadata. void recordNone(int revision) { @@ -98,6 +113,9 @@ */ public boolean tryRead(int revisionNumber, DataAccess data) throws IOException, HgInvalidControlFileException { final int daLength = data.length(); + if (lastRevRead == NO_REVISION || revisionNumber > lastRevRead) { + lastRevRead = revisionNumber; + } if (daLength < 4 || data.readByte() != 1 || data.readByte() != 10) { recordNone(revisionNumber); return false;