# [PATCH] merge: optimization to skip evaluate_result for single strategy

1 messages from 2020-05-19 to 2020-05-19. Participants: anng.sw@gmail.com.
Thread: https://gitlist.dev/t/53502

## anng.sw@gmail.com, 2020-05-19 13:05

Subject: [PATCH] merge: optimization to skip evaluate_result for single strategy
Message-ID: <20200519130535.23770-1-anng.sw@gmail.com>
URL: https://gitlist.dev/e/20200519130535.23770-1-anng.sw%40gmail.com

```
From: Andrew Ng <andrew.ng@sony.com>

For a merge with a single strategy, the result of evaluate_result() is
effectively not used and therefore is not needed, so avoid altogether.

On Windows, this optimization can halve the time required to perform a
recursive merge of a single commit with the LLVM repo.

Signed-off-by: Andrew Ng <andrew.ng@sony.com>
Reviewed-by: Junio C Hamano <gitster@pobox.com>
---
 builtin/merge.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/builtin/merge.c b/builtin/merge.c
index ca6a5dc4bf..7da707bf55 100644
--- a/builtin/merge.c
+++ b/builtin/merge.c
@@ -1656,7 +1656,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
 				}
 				merge_was_ok = 1;
 			}
-			cnt = evaluate_result();
+			cnt = (use_strategies_nr > 1) ? evaluate_result() : 0;
 			if (best_cnt <= 0 || cnt <= best_cnt) {
 				best_strategy = use_strategies[i]->name;
 				best_cnt = cnt;
-- 
2.26.2.windows.1


```
