On Friday 19 September 2008 17:04:54 Johannes Sixt wrote:
> Alexander Gavrilov schrieb:
> > Also, it should work in the patch mode as well: it reads the patch as
> > binary, and decodes each line separately, based on the encoding
> > determined for the current file.
>
> This is great. But we'll have to see how this works on a multi-file diff
> on Windows. (I sense slowness.)
>
Yes, yesterday I noticed that when the patch is very big, like when the
index has got out of sync, and gitk claims local changes in all of the git-gui
repository (>1000 files), first view is slow even on Linux.
I made a patch to optimize attribute lookup. I'm afraid that further optimization
is impossible without interface changes in git-check-attr, or reimplementing
the attribute parser in Tcl.
--- >8 ---
From: Alexander Gavrilov <angavrilov@xxxxxxxxx>
Subject: [PATCH] gitk: Implement batch lookup and caching of encoding attrs.
When the diff contains thousands of files, calling git-check-attr
once per file is very slow. With this patch gitk does attribute
lookup in batches of 30 files while reading the diff file list,
which leads to a very noticeable speedup.
Signed-off-by: Alexander Gavrilov <angavrilov@xxxxxxxxx>
---
gitk | 34 +++++++++++++++++++++++++++++++++-
1 files changed, 33 insertions(+), 1 deletions(-)
diff --git a/gitk b/gitk
index 1355aa2..6fc1e90 100755
--- a/gitk
+++ b/gitk
@@ -6530,6 +6530,7 @@ proc gettreediffline {gdtf ids} {
global cmitmode vfilelimit curview limitdiffs
set nr 0
+ set sublist {}
while {[incr nr] <= 1000 && [gets $gdtf line] >= 0} {
set i [string first "\t" $line]
if {$i >= 0} {
@@ -6539,8 +6540,10 @@ proc gettreediffline {gdtf ids} {
}
set file [encoding convertfrom $file]
lappend treediff $file
+ lappend sublist $file
}
}
+ cache_gitattr encoding $sublist
if {![eof $gdtf]} {
return [expr {$nr >= 1000? 2: 1}]
}
@@ -9839,18 +9842,47 @@ proc tcl_encoding {enc} {
}
proc gitattr {path attr default} {
- if {[catch {set r [exec git check-attr $attr -- $path]}]} {
+ global path_attr_cache
+ if {[info exists path_attr_cache($attr,$path)]} {
+ set r $path_attr_cache($attr,$path)
+ } elseif {[catch {set r [exec git check-attr $attr -- $path]}]} {
set r unspecified
} else {
set r [join [lrange [split $r :] 2 end] :]
regsub {^ } $r {} r
}
+ set path_attr_cache($attr,$path) $r
if {$r eq {unspecified}} {
return $default
}
return $r
}
+proc cache_gitattr {attr pathlist} {
+ global path_attr_cache
+ set newlist {}
+ foreach path $pathlist {
+ if {[info exists path_attr_cache($attr,$path)]} continue
+ lappend newlist $path
+ }
+ while {$newlist ne {}} {
+ set head [lrange $newlist 0 29]
+ set newlist [lrange $newlist 30 end]
+ if {![catch {set rlist [eval exec git check-attr $attr -- $head]}]} {
+ foreach row [split $rlist "\n"] {
+ set cols [split $row :]
+ set path [lindex $cols 0]
+ set value [join [lrange $cols 2 end] :]
+ if {[string index $path 0] eq "\""} {
+ set path [encoding convertfrom [lindex $path 0]]
+ }
+ set path_attr_cache($attr,$path) $value
+ }
+ }
+ update
+ }
+}
+
proc get_path_encoding {path} {
global gui_encoding
set tcl_enc [tcl_encoding $gui_encoding]
--
1.6.0.20.g6148bc
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