From: Elijah Newren <newren@xxxxxxxxx>
estimate_similarity() was setting up a diff_populate_filespec_options
every time it was called, requiring the caller of estimate_similarity()
to pass in some data needed to set up this option. Currently the needed
data consisted of a single variable (skip_unmodified), but we want to
also have the different estimate_similarity() callsites start using
different missing_object_cb functions as well. Rather than also passing
that data in, just have the caller pass in the whole
diff_populate_filespec_options, and reduce the number of times we need to
set it up.
As a side note, this also drops the number of calls to
has_promisor_remote() dramatically. If L is the number of basename
paths to compare, M is the number of inexact sources, and N is the
number of inexact destinations, then the number of calls to
has_promisor_remote() drops from L+M*N down to at most 2 -- one for each
of the sites that calls estimate_similarity(). has_promisor_remote() is
a very fast function so this almost certainly has no measurable
performance impact, but it seems cleaner to avoid calling that function
so many times.
Signed-off-by: Elijah Newren <newren@xxxxxxxxx>
---
diffcore-rename.c | 58 +++++++++++++++++++++++++++++++----------------
1 file changed, 39 insertions(+), 19 deletions(-)
diff --git a/diffcore-rename.c b/diffcore-rename.c
index 35378d84e8f1..e13e52046026 100644
--- a/diffcore-rename.c
+++ b/diffcore-rename.c
@@ -126,7 +126,7 @@ static int estimate_similarity(struct repository *r,
struct diff_filespec *src,
struct diff_filespec *dst,
int minimum_score,
- int skip_unmodified)
+ struct diff_populate_filespec_options *dpf_opt)
{
/* src points at a file that existed in the original tree (or
* optionally a file in the destination tree) and dst points
@@ -143,15 +143,6 @@ static int estimate_similarity(struct repository *r,
*/
unsigned long max_size, delta_size, base_size, src_copied, literal_added;
int score;
- struct diff_populate_filespec_options dpf_options = {
- .check_size_only = 1
- };
- struct prefetch_options prefetch_options = {r, skip_unmodified};
-
- if (r == the_repository && has_promisor_remote()) {
- dpf_options.missing_object_cb = prefetch;
- dpf_options.missing_object_data = &prefetch_options;
- }
/* We deal only with regular files. Symlink renames are handled
* only when they are exact matches --- in other words, no edits
@@ -169,11 +160,13 @@ static int estimate_similarity(struct repository *r,
* is a possible size - we really should have a flag to
* say whether the size is valid or not!)
*/
+ dpf_opt->check_size_only = 1;
+
if (!src->cnt_data &&
- diff_populate_filespec(r, src, &dpf_options))
+ diff_populate_filespec(r, src, dpf_opt))
return 0;
if (!dst->cnt_data &&
- diff_populate_filespec(r, dst, &dpf_options))
+ diff_populate_filespec(r, dst, dpf_opt))
return 0;
max_size = ((src->size > dst->size) ? src->size : dst->size);
@@ -191,11 +184,11 @@ static int estimate_similarity(struct repository *r,
if (max_size * (MAX_SCORE-minimum_score) < delta_size * MAX_SCORE)
return 0;
- dpf_options.check_size_only = 0;
+ dpf_opt->check_size_only = 0;
- if (!src->cnt_data && diff_populate_filespec(r, src, &dpf_options))
+ if (!src->cnt_data && diff_populate_filespec(r, src, dpf_opt))
return 0;
- if (!dst->cnt_data && diff_populate_filespec(r, dst, &dpf_options))
+ if (!dst->cnt_data && diff_populate_filespec(r, dst, dpf_opt))
return 0;
if (diffcore_count_changes(r, src, dst,
@@ -862,7 +855,11 @@ static int find_basename_matches(struct diff_options *options,
int i, renames = 0;
struct strintmap sources;
struct strintmap dests;
-
+ struct diff_populate_filespec_options dpf_options = {
+ .check_binary = 0,
+ .missing_object_cb = NULL,
+ .missing_object_data = NULL
+ };
/*
* The prefeteching stuff wants to know if it can skip prefetching
* blobs that are unmodified...and will then do a little extra work
@@ -873,7 +870,10 @@ static int find_basename_matches(struct diff_options *options,
* the extra work necessary to check if rename_src entries are
* unmodified would be a small waste.
*/
- int skip_unmodified = 0;
+ struct prefetch_options prefetch_options = {
+ .repo = options->repo,
+ .skip_unmodified = 0
+ };
/*
* Create maps of basename -> fullname(s) for remaining sources and
@@ -910,6 +910,11 @@ static int find_basename_matches(struct diff_options *options,
strintmap_set(&dests, base, i);
}
+ if (options->repo == the_repository && has_promisor_remote()) {
+ dpf_options.missing_object_cb = prefetch;
+ dpf_options.missing_object_data = &prefetch_options;
+ }
+
/* Now look for basename matchups and do similarity estimation */
for (i = 0; i < rename_src_nr; ++i) {
char *filename = rename_src[i].p->one->path;
@@ -953,7 +958,7 @@ static int find_basename_matches(struct diff_options *options,
one = rename_src[src_index].p->one;
two = rename_dst[dst_index].p->two;
score = estimate_similarity(options->repo, one, two,
- minimum_score, skip_unmodified);
+ minimum_score, &dpf_options);
/* If sufficiently similar, record as rename pair */
if (score < minimum_score)
@@ -1272,6 +1277,14 @@ void diffcore_rename_extended(struct diff_options *options,
int num_sources, want_copies;
struct progress *progress = NULL;
struct dir_rename_info info;
+ struct diff_populate_filespec_options dpf_options = {
+ .check_binary = 0,
+ .missing_object_cb = NULL,
+ .missing_object_data = NULL
+ };
+ struct prefetch_options prefetch_options = {
+ .repo = options->repo
+ };
trace2_region_enter("diff", "setup", options->repo);
info.setup = 0;
@@ -1433,6 +1446,13 @@ void diffcore_rename_extended(struct diff_options *options,
(uint64_t)num_destinations * (uint64_t)num_sources);
}
+ /* Finish setting up dpf_options */
+ prefetch_options.skip_unmodified = skip_unmodified;
+ if (options->repo == the_repository && has_promisor_remote()) {
+ dpf_options.missing_object_cb = prefetch;
+ dpf_options.missing_object_data = &prefetch_options;
+ }
+
CALLOC_ARRAY(mx, st_mult(NUM_CANDIDATE_PER_DST, num_destinations));
for (dst_cnt = i = 0; i < rename_dst_nr; i++) {
struct diff_filespec *two = rename_dst[i].p->two;
@@ -1458,7 +1478,7 @@ void diffcore_rename_extended(struct diff_options *options,
this_src.score = estimate_similarity(options->repo,
one, two,
minimum_score,
- skip_unmodified);
+ &dpf_options);
this_src.name_score = basename_same(one, two);
this_src.dst = i;
this_src.src = j;
--
gitgitgadget
