Profiler

Definitions

1. A tool that measures where a program spends its time and memory, typically by sampling the call stack at intervals or instrumenting function entry/exit. Profilers produce flame graphs, call trees, or allocation traces that reveal bottlenecks. Examples include perf, pprof, Instruments, and Chrome DevTools' Performance tab.

   In plain English: A tool that watches your program run and tells you exactly which parts are slow or using too much memory.

   Example: "The profiler showed 40% of CPU time was spent in JSON serialization — switching to a streaming serializer fixed the latency."

Related Terms

• lazy loading
• Cache
• Profile
• Trace
• Vectorization
• Hot Path
• Lookup Table
• Memory Profile
• Prefetch
• Stepper
• Time to First Byte Culture
• StormForge
• Code Performance