Performance Optimization
Profiling, benchmarking, CPU profiling, memory profiling, bottleneck analysis, optimizations
1What is the pprof tool in Go?
What is the pprof tool in Go?
回答
pprof is Go's built-in profiling tool that analyzes CPU, memory, goroutines and other metrics. It generates binary format profiles that can be analyzed with go tool pprof. This tool is essential for identifying performance bottlenecks and optimizing Go applications in production.
2How to enable CPU profiling in a Go application?
How to enable CPU profiling in a Go application?
回答
CPU profiling is enabled with pprof.StartCPUProfile(file) and stopped with pprof.StopCPUProfile(). This approach captures CPU usage during program execution. For web applications, using the net/http/pprof package automatically exposes profiling endpoints.
3What is the difference between CPU profiling and memory profiling?
What is the difference between CPU profiling and memory profiling?
回答
CPU profiling measures time spent in each function to identify execution bottlenecks, while memory profiling measures memory allocations to detect leaks and excessive usage. CPU profiling uses sampling every 10ms by default, memory profiling captures all allocations or a sample depending on configuration.
How to create a benchmark in Go with the testing package?
What does the result '1000 ns/op' mean in a Go benchmark?
+19 面接問題