You're asked to "optimize this function, it's slow." What do you do before you touch the code?
First establish the current numbers and a target with a reproducible benchmark, pin down the bottleneck with a profiler, then change the code, and re-measure with the same benchmark afterward.
Performance and debuggingMultiple choiceIntro
You want to measure app performance as the basis for optimization. Which are correct…
#measurement #profiling
Performance and debuggingShort answerBasics
All you've got is vague feedback that "the app is slow." How do you approach that with…
#profiling
Performance and debuggingShort answerBasics
Someone reports that search results take too long to appear. Instead of printing…
#measurement
Performance and debuggingShort answerExpert
In Time Profiler, the top entries on the scrolling hot path are swift_retain…
#optimization