From 252d560d215581637fcddd7a0a18f89204ecc8d1 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ren=C3=A9=20Scharfe?= Date: Sat, 7 Mar 2009 13:27:15 +0100 Subject: [PATCH] grep: micro-optimize hit collection for AND nodes In addition to returning if an expression matches a line, match_expr_eval() updates the expression's hit flag if the parameter collect_hits is set. It never sets collect_hits for children of AND nodes, though, so their hit flag will never be updated. Because of that we can return early if the first child didn't match, no matter if collect_hits is set or not. Signed-off-by: Rene Scharfe Signed-off-by: Junio C Hamano --- grep.c | 10 +++------- 1 file changed, 3 insertions(+), 7 deletions(-) diff --git a/grep.c b/grep.c index 062b2b6f28..db341b6797 100644 --- a/grep.c +++ b/grep.c @@ -394,13 +394,9 @@ static int match_expr_eval(struct grep_opt *o, h = !match_expr_eval(o, x->u.unary, bol, eol, ctx, 0); break; case GREP_NODE_AND: - if (!collect_hits) - return (match_expr_eval(o, x->u.binary.left, - bol, eol, ctx, 0) && - match_expr_eval(o, x->u.binary.right, - bol, eol, ctx, 0)); - h = match_expr_eval(o, x->u.binary.left, bol, eol, ctx, 0); - h &= match_expr_eval(o, x->u.binary.right, bol, eol, ctx, 0); + if (!match_expr_eval(o, x->u.binary.left, bol, eol, ctx, 0)) + return 0; + h = match_expr_eval(o, x->u.binary.right, bol, eol, ctx, 0); break; case GREP_NODE_OR: if (!collect_hits)