From 6b13bc32322dc64e52ef29c9f527746ad30d0ad8 Mon Sep 17 00:00:00 2001 From: Phillip Wood Date: Wed, 17 Nov 2021 11:20:25 +0000 Subject: [PATCH] xdiff: simplify comparison Now that the histogram algorithm calls xdl_classify_record() it is no longer necessary to use xdl_recmatch() to compare lines, it is sufficient just to compare the hash values. This has a negligible effect on performance. Test HEAD~1 HEAD ----------------------------------------------------------------------------- 4000.1: log -3000 (baseline) 0.19(0.12+0.07) 0.18(0.14+0.04) -5.3% 4000.2: log --raw -3000 (tree-only) 0.98(0.81+0.16) 0.98(0.79+0.18) +0.0% 4000.3: log -p -3000 (Myers) 4.81(4.23+0.56) 4.80(4.26+0.53) -0.2% 4000.4: log -p -3000 --histogram 5.83(5.11+0.70) 5.82(5.15+0.65) -0.2% 4000.5: log -p -3000 --patience 5.31(4.61+0.69) 5.30(4.54+0.75) -0.2% Signed-off-by: Phillip Wood Signed-off-by: Junio C Hamano --- xdiff/xdiffi.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/xdiff/xdiffi.c b/xdiff/xdiffi.c index a4542c05b6..6a3b9280be 100644 --- a/xdiff/xdiffi.c +++ b/xdiff/xdiffi.c @@ -392,10 +392,7 @@ static xdchange_t *xdl_add_change(xdchange_t *xscr, long i1, long i2, long chg1, static int recs_match(xrecord_t *rec1, xrecord_t *rec2, long flags) { - return (rec1->ha == rec2->ha && - xdl_recmatch(rec1->ptr, rec1->size, - rec2->ptr, rec2->size, - flags)); + return (rec1->ha == rec2->ha); } /* -- 2.39.2