https://github.com/bygui86/go-pointers

Go sample project to understand difference between pointer and copy
https://github.com/bygui86/go-pointers

Last synced: 2 days ago
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Go sample project to understand difference between pointer and copy

• Host: GitHub
• URL: https://github.com/bygui86/go-pointers
• Owner: bygui86
• License: apache-2.0
• Created: 2019-08-21T14:41:14.000Z (over 5 years ago)
• Default Branch: master
• Last Pushed: 2020-03-15T15:42:27.000Z (almost 5 years ago)
• Last Synced: 2023-03-07T10:58:03.795Z (almost 2 years ago)
• Language: Go
• Size: 6.84 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        

# Go pointer vs copy

Go sample project to understand difference between pointer and copy

## Instructions

### Normal

```

# by copy

go test ./... -bench=BenchmarkMemoryStackSingle -benchmem -run='^$' -count=10 > stack.txt && benchstat stack.txt

# by pointer

go test ./... -bench=BenchmarkMemoryHeapSingle -benchmem -run='^$' -count=10 > head.txt && benchstat head.txt

```

### Normal - Limiting the processor

```

# by copy

GOMAXPROCS=1 go test ./... -bench=BenchmarkMemoryStackSingle -benchmem -run='^$' -count=10 > stack.txt && benchstat stack.txt

# by pointer

GOMAXPROCS=1 go test ./... -bench=BenchmarkMemoryHeapSingle -benchmem -run='^$' -count=10 > head.txt && benchstat head.txt

```

### Mutiple

```

# by copy

go test ./... -bench=BenchmarkMemoryStackMultiple -benchmem -run='^$' -count=10 > stack.txt && benchstat stack.txt

# by pointer

go test ./... -bench=BenchmarkMemoryHeapMultiple -benchmem -run='^$' -count=10 > head.txt && benchstat head.txt

```

### Mutiple - Limiting the processor

```

# by copy

GOMAXPROCS=1 go test ./... -bench=BenchmarkMemoryStackMultiple -benchmem -run='^$' -count=10 > stack.txt && benchstat stack.txt

# by pointer

GOMAXPROCS=1 go test ./... -bench=BenchmarkMemoryHeapMultiple -benchmem -run='^$' -count=10 > head.txt && benchstat head.txt

```

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## Links

* https://medium.com/@blanchon.vincent/go-should-i-use-a-pointer-instead-of-a-copy-of-my-struct-44b43b104963