Question 1

What is the pprof tool in Go?

Accepted Answer

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.

Question 2

How to enable CPU profiling in a Go application?

Accepted Answer

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.

Question 3

What is the difference between CPU profiling and memory profiling?

Accepted Answer

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.

Performance Optimization

What is the pprof tool in Go?

Câu trả lời

How to enable CPU profiling in a Go application?

Câu trả lời

What is the difference between CPU profiling and memory profiling?

Câu trả lời

How to create a benchmark in Go with the testing package?

What does the result '1000 ns/op' mean in a Go benchmark?

Các chủ đề phỏng vấn Go khác

Go Basics

Go Data Structures

Go Interfaces

Error Handling

Goroutines Basics

Channels

Go Modules

HTTP Server

HTTP Client

JSON Encoding

database/sql

Context Package

Testing

Concurrency Patterns

Sync Primitives

Go Web Frameworks

REST API Design

gRPC

Reflection

Memory Management

Generics

Go Design Patterns

Microservices

Security & Authentication

Docker & Containerization

Kubernetes Basics

Advanced Go

CLI Development

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