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From: Michael Niedermayer <michael@niedermayer.cc>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Date: Tue, 15 Apr 2025 20:14:33 +0200
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Subject: [FFmpeg-devel] [PATCH v2 6/6] [NOT for git] avutil/tests/map:
benchmark code
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Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
libavutil/tests/map.c | 56 +++++++++++++++++++++++++++++++++++++++++++
1 file changed, 56 insertions(+)
diff --git a/libavutil/tests/map.c b/libavutil/tests/map.c
index 38f0a153e68..72bfafdb4f4 100644
--- a/libavutil/tests/map.c
+++ b/libavutil/tests/map.c
@@ -26,6 +26,8 @@
#include "libavutil/mem.h"
#include "libavutil/map.h"
+#include "libavutil/timer.h"
+#include "libavutil/dict.h"
static void print_set(const AVMap *s)
{
@@ -37,6 +39,7 @@ static void print_set(const AVMap *s)
int main(void)
{
+#if 0
void *our_cmp[] = {
strcmp,
av_map_strcmp_keyvalue,
@@ -185,6 +188,59 @@ int main(void)
av_map_free(&set);
av_assert0(!set);
}
+#else
+#define N_ENTRIES 1000
+#define P 4
+ for (int runs = 0; runs < 1000; runs++) {
+ AVMap *map = av_map_new(strcmp, NULL, NULL);
+ for(int pass = 0; pass < 2; pass++) {
+ START_TIMER
+ unsigned r = 5;
+ for(int i=0; i<N_ENTRIES; i++) {
+ r = r*123 + 7;
+ char str[7] = "TEST";
+ str[P ] = r;
+ str[P+1] = r>>8;
+ if(pass == 0) {
+ av_map_add(map, str, 7, str, 7, 0);
+ } else {
+ av_map_get(map, str, strcmp);
+ }
+ }
+ if (pass) {
+ STOP_TIMER("av_map_get")
+ } else {
+ STOP_TIMER("av_map_add")
+ }
+ }
+ av_map_free(&map);
+ }
+
+ for (int runs = 0; runs < 1000; runs++) {
+ AVDictionary *dict = NULL;
+ for(int pass = 0; pass < 2; pass++) {
+ START_TIMER
+ unsigned r = 5;
+ for(int i=0; i<N_ENTRIES; i++) {
+ r = r*123 + 7;
+ char str[7] = "TEST";
+ str[P ] = r;
+ str[P+1] = r>>8;
+ if(pass == 0) {
+ av_dict_set(&dict, str, str, 0);
+ } else {
+ av_dict_get(dict, str, NULL, 0);
+ }
+ }
+ if (pass) {
+ STOP_TIMER("av_dict_get")
+ } else {
+ STOP_TIMER("av_dict_set")
+ }
+ }
+ av_dict_free(&dict);
+ }
+#endif
return 0;
}
--
2.49.0
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