From fc3abdf5cb16914fb22747d7c3fb44258712a36d Mon Sep 17 00:00:00 2001 From: Junio C Hamano Date: Thu, 3 May 2007 13:05:48 -0700 Subject: diff: release blobs after generating textual diff. This reduces the memory pressure when dealing with many paths. An unscientific test of running "diff-tree --stat --summary -M" between v2.6.19 and v2.6.20-rc1 in the linux kernel repository indicates that the number of minor faults are reduced by 2/3. Signed-off-by: Junio C Hamano --- diff.c | 22 +++++++++++++++++----- 1 file changed, 17 insertions(+), 5 deletions(-) diff --git a/diff.c b/diff.c index 7bbe7590b2..2979bc57e4 100644 --- a/diff.c +++ b/diff.c @@ -1236,6 +1236,8 @@ static void builtin_diff(const char *name_a, } free_ab_and_return: + diff_free_filespec_data(one); + diff_free_filespec_data(two); free(a_one); free(b_two); return; @@ -1262,7 +1264,7 @@ static void builtin_diffstat(const char *name_a, const char *name_b, diff_populate_filespec(two, 0); data->deleted = count_lines(one->data, one->size); data->added = count_lines(two->data, two->size); - return; + goto free_and_return; } if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) die("unable to read files to diff"); @@ -1284,6 +1286,10 @@ static void builtin_diffstat(const char *name_a, const char *name_b, ecb.priv = diffstat; xdl_diff(&mf1, &mf2, &xpp, &xecfg, &ecb); } + + free_and_return: + diff_free_filespec_data(one); + diff_free_filespec_data(two); } static void builtin_checkdiff(const char *name_a, const char *name_b, @@ -1306,7 +1312,7 @@ static void builtin_checkdiff(const char *name_a, const char *name_b, die("unable to read files to diff"); if (file_is_binary(two)) - return; + goto free_and_return; else { /* Crazy xdl interfaces.. */ xpparam_t xpp; @@ -1320,6 +1326,9 @@ static void builtin_checkdiff(const char *name_a, const char *name_b, ecb.priv = &data; xdl_diff(&mf1, &mf2, &xpp, &xecfg, &ecb); } + free_and_return: + diff_free_filespec_data(one); + diff_free_filespec_data(two); } struct diff_filespec *alloc_filespec(const char *path) @@ -1507,7 +1516,7 @@ int diff_populate_filespec(struct diff_filespec *s, int size_only) size_only = 0; if (s->data) - return err; + return 0; if (S_ISDIRLNK(s->mode)) return diff_populate_gitlink(s, size_only); @@ -1597,8 +1606,11 @@ void diff_free_filespec_data(struct diff_filespec *s) free(s->data); else if (s->should_munmap) munmap(s->data, s->size); - s->should_free = s->should_munmap = 0; - s->data = NULL; + + if (s->should_free || s->should_munmap) { + s->should_free = s->should_munmap = 0; + s->data = NULL; + } free(s->cnt_data); s->cnt_data = NULL; } -- cgit v1.2.3