WIP: basetransform: Only intersect caps when needed
A lot of elements are going to return proper caps which are subsets of what they can handle (subset of their template caps). Instead of penalizing everybody with expensive caps intersection (both in terms of cpu and memory), first check whether the caps are already valid.
capsnego benchmark
(average of 4 runs)
| before | after | diff | % of before | |
|---|---|---|---|---|
| reached PAUSED state | 2.145 | 1.9716 | - 0.1734 | 92 |
| heaptrack: allocations | 45357603 | 32609210 | - 12748393 | 72 |
| heaptrack: temporary allocations | 42894 | 53082 | + 10188 | 124 |
mass nego
GST_REGISTRY_UPDATE=no time gst-launch-1.0 videotestsrc num-buffers=1 ! { 42 x videoconvert } ! autovideosink
Average of 4 runs
| before | after | diff | % of before | |
|---|---|---|---|---|
| time user | 0.78 | 0.46 | 0.32 | 59 |
| time elapsed | 0.9 | 0.55 | 0.35 | 61 |
| heaptrack: allocations | 4133956 | 2468346 | 1665610 | 60 |
| heaptrack: temporary allocations | 43463 | 37757 | 5706 | 87 |