From: Taylor Blau <ttaylorr@xxxxxxxxxx>
Teach git to provide a way for users to enable/disable bitmap lookup
table extension by providing a config option named 'writeBitmapLookupTable'.
Signed-off-by: Taylor Blau <ttaylorr@xxxxxxxxxx>
Signed-off-by: Abhradeep Chakraborty <chakrabortyabhradeep79@xxxxxxxxx>
---
Documentation/config/pack.txt | 7 +++++++
builtin/pack-objects.c | 8 ++++++++
2 files changed, 15 insertions(+)
diff --git a/Documentation/config/pack.txt b/Documentation/config/pack.txt
index ad7f73a1ead..e12008d2415 100644
--- a/Documentation/config/pack.txt
+++ b/Documentation/config/pack.txt
@@ -164,6 +164,13 @@ When writing a multi-pack reachability bitmap, no new namehashes are
computed; instead, any namehashes stored in an existing bitmap are
permuted into their appropriate location when writing a new bitmap.
+pack.writeBitmapLookupTable::
+ When true, git will include a "lookup table" section in the
+ bitmap index (if one is written). This table is used to defer
+ loading individual bitmaps as late as possible. This can be
+ beneficial in repositories which have relatively large bitmap
+ indexes. Defaults to false.
+
pack.writeReverseIndex::
When true, git will write a corresponding .rev file (see:
link:../technical/pack-format.html[Documentation/technical/pack-format.txt])
diff --git a/builtin/pack-objects.c b/builtin/pack-objects.c
index cc5f41086da..3ba20301980 100644
--- a/builtin/pack-objects.c
+++ b/builtin/pack-objects.c
@@ -3148,6 +3148,14 @@ static int git_pack_config(const char *k, const char *v, void *cb)
else
write_bitmap_options &= ~BITMAP_OPT_HASH_CACHE;
}
+
+ if (!strcmp(k, "pack.writebitmaplookuptable")) {
+ if (git_config_bool(k, v))
+ write_bitmap_options |= BITMAP_OPT_LOOKUP_TABLE;
+ else
+ write_bitmap_options &= ~BITMAP_OPT_LOOKUP_TABLE;
+ }
+
if (!strcmp(k, "pack.usebitmaps")) {
use_bitmap_index_default = git_config_bool(k, v);
return 0;
--
gitgitgadget
