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author | Nguyễn Thái Ngọc Duy <pclouds@gmail.com> | 2018-01-27 15:27:56 +0300 |
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committer | Junio C Hamano <gitster@pobox.com> | 2018-02-02 22:20:16 +0300 |
commit | ca54d9baa4a8e73141d4c963245ee6f09dcc994d (patch) | |
tree | d0418cefb4c51789cc338eed93c7b0933644d012 /read-cache.c | |
parent | 5be1f00a9a701532232f57958efab4be8c959a29 (diff) |
trace: measure where the time is spent in the index-heavy operations
All the known heavy code blocks are measured (except object database
access). This should help identify if an optimization is effective or
not. An unoptimized git-status would give something like below:
0.001791141 s: read cache ...
0.004011363 s: preload index
0.000516161 s: refresh index
0.003139257 s: git command: ... 'status' '--porcelain=2'
0.006788129 s: diff-files
0.002090267 s: diff-index
0.001885735 s: initialize name hash
0.032013138 s: read directory
0.051781209 s: git command: './git' 'status'
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'read-cache.c')
-rw-r--r-- | read-cache.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/read-cache.c b/read-cache.c index 2eb81a66b9..eac74bc9f1 100644 --- a/read-cache.c +++ b/read-cache.c @@ -1372,6 +1372,7 @@ int refresh_index(struct index_state *istate, unsigned int flags, const char *typechange_fmt; const char *added_fmt; const char *unmerged_fmt; + uint64_t start = getnanotime(); modified_fmt = (in_porcelain ? "M\t%s\n" : "%s: needs update\n"); deleted_fmt = (in_porcelain ? "D\t%s\n" : "%s: needs update\n"); @@ -1442,6 +1443,7 @@ int refresh_index(struct index_state *istate, unsigned int flags, replace_index_entry(istate, i, new); } + trace_performance_since(start, "refresh index"); return has_errors; } @@ -1873,6 +1875,7 @@ static void freshen_shared_index(char *base_sha1_hex, int warn) int read_index_from(struct index_state *istate, const char *path) { + uint64_t start = getnanotime(); struct split_index *split_index; int ret; char *base_sha1_hex; @@ -1883,6 +1886,7 @@ int read_index_from(struct index_state *istate, const char *path) return istate->cache_nr; ret = do_read_index(istate, path, 0); + trace_performance_since(start, "read cache %s", path); split_index = istate->split_index; if (!split_index || is_null_sha1(split_index->base_sha1)) { @@ -1906,6 +1910,7 @@ int read_index_from(struct index_state *istate, const char *path) freshen_shared_index(base_sha1_hex, 0); merge_base_index(istate); post_read_index_from(istate); + trace_performance_since(start, "read cache %s", base_path); return ret; } @@ -2234,6 +2239,7 @@ void update_index_if_able(struct index_state *istate, struct lock_file *lockfile static int do_write_index(struct index_state *istate, struct tempfile *tempfile, int strip_extensions) { + uint64_t start = getnanotime(); int newfd = tempfile->fd; git_SHA_CTX c; struct cache_header hdr; @@ -2374,6 +2380,7 @@ static int do_write_index(struct index_state *istate, struct tempfile *tempfile, return -1; istate->timestamp.sec = (unsigned int)st.st_mtime; istate->timestamp.nsec = ST_MTIME_NSEC(st); + trace_performance_since(start, "write index, changed mask = %x", istate->cache_changed); return 0; } |