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Thread-Topic: [FFmpeg-devel] [PATCH v3] [NOT for git] avutil/tests/map:
benchmark code [BENCHMARK included]
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Subject: Re: [FFmpeg-devel] [PATCH v3] [NOT for git] avutil/tests/map:
benchmark code [BENCHMARK included]
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> -----Original Message-----
> From: ffmpeg-devel <ffmpeg-devel-bounces@ffmpeg.org> On Behalf Of
> Michael Niedermayer
> Sent: Dienstag, 15. April 2025 22:51
> To: FFmpeg development discussions and patches <ffmpeg-
> devel@ffmpeg.org>
> Subject: [FFmpeg-devel] [PATCH v3] [NOT for git] avutil/tests/map:
> benchmark code [BENCHMARK included]
>
[..]
>
> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
> ---
> libavutil/tests/map.c | 57
> +++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 57 insertions(+)
>
> diff --git a/libavutil/tests/map.c b/libavutil/tests/map.c
> index 38f0a153e68..90950769f98 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 +188,60 @@ int main(void)
> av_map_free(&set);
> av_assert0(!set);
> }
> +#else
> +#define N_ENTRIES 1000
> +#define P 4
> + fprintf(stderr, "%d entries variable bytes at location %d-%d\n",
> N_ENTRIES, P, P+1);
> + for (int runs = 0; runs < 1000; runs++) {
> + AVMap *map = av_map_new(av_strcasecmp, 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, av_strcasecmp);
> + }
> + }
> + 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;
> }
> --
Hi Michael,
is av_map_get() supposed tg work? I wasn't able to retrieve any values
(always null return).
Thanks
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