Code:
import vapoursynth as vs
core = vs.get_core(threads=0)
core.max_cache_size = 32000
c = core.std.BlankClip(width=1920, height=1080, format=vs.YUV420P8, length=2000)
c = core.eedi3m.EEDI3(c, field=0, opt=4)
c.set_output()
AMD ryzen 1950x stock
VS EEDI3 r1 x64
AVX2: 33.57fps
VS EEDI3 r2 x64
pure c: 6.14fps
sse2: 21.87fps
sse4.1: 27.58fps
AVX: 35fps