Chapter 2

Profiling with pprof

Where is the time really going?

~16 min total2 lessonsAssignment

By the end of this chapter you'll be able to

Capture CPU + heap profiles
Read a flame graph

Lessons

Module: Tools

CPU profile

Capture, open in pprof, find the hot frame.

8mmedium

Heap profile

Find allocation sources and reduce GC pressure.

8mmedium

Chapter assignment

Profile + diagnose

Capture a CPU + heap profile of your benchmark. Identify the hottest function. Write 1 paragraph describing what surprises you (almost always there's a surprise).

See success criteria

Lesson 1 takes ~8 min.

Start chapter

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ch.1: Microbenchmarks 101 ch.3: Measure → Change → Measure