Add benchmark for roundtrip of 100 large WebSocket messages #7418

Job	Run time
Generate llhttp sources	6s
Linter	1m 2s
Benchmark	2m 11s
Test (3.9, ubuntu, false)	7m 31s
Test (3.9, macos, false)	4m 42s
Test (3.9, windows, false)	7m 30s
Test (3.9, Y, ubuntu, false)	7m 22s
Test (3.10, ubuntu, false)	6m 27s
Test (3.10, macos, false)	4m 41s
Test (3.10, windows, false)	6m 59s
Test (3.10, Y, ubuntu, false)	7m 25s
Test (3.11, ubuntu, false)	7m 12s
Test (3.11, macos, false)	4m 41s
Test (3.11, windows, false)	6m 17s
Test (3.11, Y, ubuntu, false)	7m 35s
Test (3.12, ubuntu, false)	7m 55s
Test (3.12, macos, false)	5m 17s
Test (3.12, windows, false)	8m 30s
Test (3.12, Y, ubuntu, false)	8m 23s
Test (3.13, ubuntu, false)	6m 56s
Test (3.13, macos, false)	5m 1s
Test (3.13, windows, false)	8m 29s
Test (3.13, Y, ubuntu, false)	7m 46s
Test (pypy-3.9, Y, ubuntu, false)	14m 0s
Test (ubuntu, 3.14, true, Y)	2m 35s
check	2s
Pre-Deploy	0s
Build wheels on ${{ matrix.os }} ${{ matrix.qemu }}	0s
Tarball	0s
Deploy	0s
	2h 36m 35s

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