perf(git-locked): replace sed by cut

[Rudxain]

This is a micro-optimization. I did it on my own, but I asked Copilot if it could be improved, it suggested these (not tested):

git ls-files -v | sed -n '/^S /s///p'
git ls-files -v | awk '/^S /{print substr($0,3)}'

[hyperupcall]

Thanks, since this is labeled as an optimization as there any numbers to show it?

[Rudxain]

any numbers to show it?

no 😅, but here's my reasoning for why it should be faster:

• sed has to interpret an expression, while cut only has to parse a range
• sed has to check that the expression matches every line (too much branching), while cut unconditionally slices every line. There could be a speed "tie" if the sed counterpart used the expression s|^..||

[hyperupcall]

Those could make sense, but I"m not sure if any of those statements are really true without benchmarking and reading the tools' code. Unless there's shown to be a big difference, I think it's best to leave it the way it is. Code churn has a cost