mirrors/jgit - jgit - source @ dussan.org

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Tree: 552682dc6a

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Author SHA1 Message Date

Author	SHA1	Message	Date
Shawn O. Pearce	552682dc6a	Sort Config entries and use O(log N) lookup Decrease running time for getStringList (and all other get methods) by looking for configuration entries using binary search rather than linear search through the configuration file. Configuration lines are sorted by section, subsection, name in a sorted list whenever the snapshot is rebuilt. Binary search is used to locate an index in the middle of the values, then walk backwards to find the first value in the range. Given a configuration of file of 5000 distinct section/subsection/name triplets (e.g. a Gerrit Code Review project.config configuration file with 5000 unique access control rules), this new code is faster to lookup each rule individually using getStringList(): old setStringList() 194 usec avg getStringList() 196 usec avg new setStringList() 188 usec avg getStringList() 24 usec avg Change-Id: Ic8907231868c18eb946b72f341a6b58666b70324	12 years ago
Shawn O. Pearce	581e6ca2fe	Extract inner classes from Config The Config class is getting very large. Extract two of its inner classes into new top level types to reduce the size of Config. Rename them slightly in the process. Change-Id: I693148a5ae2977378789bf455c880a6fd856c0f0	12 years ago
Git Development Community	1a6964c827	Initial JGit contribution to eclipse.org Per CQ 3448 this is the initial contribution of the JGit project to eclipse.org. It is derived from the historical JGit repository at commit `3a2dd9921c`. Signed-off-by: Shawn O. Pearce <spearce@spearce.org>	14 years ago

Shawn O. Pearce

552682dc6a

Sort Config entries and use O(log N) lookup

Decrease running time for getStringList (and all other get methods) by
looking for configuration entries using binary search rather than
linear search through the configuration file.

Configuration lines are sorted by section, subsection, name in a
sorted list whenever the snapshot is rebuilt. Binary search is used to
locate an index in the middle of the values, then walk backwards to
find the first value in the range.

Given a configuration of file of 5000 distinct section/subsection/name
triplets (e.g. a Gerrit Code Review project.config configuration file
with 5000 unique access control rules), this new code is faster to
lookup each rule individually using getStringList():

  old setStringList() 194 usec avg
      getStringList() 196 usec avg

  new setStringList() 188 usec avg
      getStringList()  24 usec avg

Change-Id: Ic8907231868c18eb946b72f341a6b58666b70324

12 years ago

Shawn O. Pearce

581e6ca2fe

Extract inner classes from Config

The Config class is getting very large. Extract two of its inner
classes into new top level types to reduce the size of Config.
Rename them slightly in the process.

Change-Id: I693148a5ae2977378789bf455c880a6fd856c0f0

12 years ago

Git Development Community

1a6964c827

Initial JGit contribution to eclipse.org

Per CQ 3448 this is the initial contribution of the JGit project
to eclipse.org.  It is derived from the historical JGit repository
at commit 3a2dd9921c.

Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

14 years ago

2 Commits (552682dc6aa8f3a77fac9a2d25a20914fcc65ba0)