From 785bf2088e54ed8a450edb5c7371286ff6405605 Mon Sep 17 00:00:00 2001 From: Elijah Newren Date: Fri, 16 Jul 2021 05:22:31 +0000 Subject: merge-ort: resolve paths early when we have sufficient information When there are no directories involved at a given path, and all three sides have a file at that path, and two of the three sides of history match, we can immediately resolve the merge of that path in collect_merge_info() and do not need to wait until process_entries(). This is actually a very minor improvement: half the time when I run it, I see an improvement; the other half a slowdown. It seems to be in the range of noise. However, this idea serves as the beginning of some bigger optimizations coming in the following patches. Signed-off-by: Elijah Newren Signed-off-by: Junio C Hamano --- merge-ort.c | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) diff --git a/merge-ort.c b/merge-ort.c index 8cfa0ccd3c..5704326973 100644 --- a/merge-ort.c +++ b/merge-ort.c @@ -1023,6 +1023,43 @@ static int collect_merge_info_callback(int n, return mask; } + /* + * If the sides match, and all three paths are present and are + * files, then we can take either as the resolution. We can't do + * this with trees, because there may be rename sources from the + * merge_base. + */ + if (sides_match && filemask == 0x07) { + /* use side1 (== side2) version as resolution */ + setup_path_info(opt, &pi, dirname, info->pathlen, fullpath, + names, names+1, side1_null, 0, + filemask, dirmask, 1); + return mask; + } + + /* + * If side1 matches mbase and all three paths are present and are + * files, then we can use side2 as the resolution. We cannot + * necessarily do so this for trees, because there may be rename + * destinations within side2. + */ + if (side1_matches_mbase && filemask == 0x07) { + /* use side2 version as resolution */ + setup_path_info(opt, &pi, dirname, info->pathlen, fullpath, + names, names+2, side2_null, 0, + filemask, dirmask, 1); + return mask; + } + + /* Similar to above but swapping sides 1 and 2 */ + if (side2_matches_mbase && filemask == 0x07) { + /* use side1 version as resolution */ + setup_path_info(opt, &pi, dirname, info->pathlen, fullpath, + names, names+1, side1_null, 0, + filemask, dirmask, 1); + return mask; + } + /* * Gather additional information used in rename detection. */ -- cgit v1.2.3