Performance issue analysis

[ashwanirathee]

• As noted in ImageCorners.jl benchmarks image_benchmarks#7, we are lagging behind in couple of places and need to figure out where we are lagging, hence this is needed before next release.

[ashwanirathee]

Profiling data for algorithm: harris, shi_tomasi, kitchen_rosenfeld

Profiling code and profiled .jlprof files are available here: https://github.com/ashwani-rathee/JuliaImages-ProfileView/tree/main/ImageCorners.jl

[timholy]

Did you ever figure out if they are doing the same computation? You can even see if we return the exact same result as them for the same image. Assuming there might be a difference you might want to use small test cases rather than typical test images so you can trace down any differences.