英文:
Test memory consumption
问题
我需要验证特定函数在执行过程中消耗的内存量，并确保它保持在特定的限制之下。
理想情况下，我希望在测试或基准测试中进行这个操作。据我所知，唯一的方法是创建一个单独的测试二进制文件，并使用BenchmarkResult来进行测试，示例如下：
func Benchmark(f func(b *B)) BenchmarkResult
这样做是正确的吗？
英文:
I need to verify how much memory a specific function consumes during execution, and make sure that it stays under a specific limit.
Ideally I'd like to do this in a test or benchmark. As far as I can see the only way to do this is to create a separate test binary and use the BenchmarkResult from
func Benchmark(f func(b *B)) BenchmarkResult
Is this the correct way to do this?
答案1
得分: 20
这不是你使用testing包的正确方式。只需创建一个名为something_test.go的文件，并编写一个名为func BenchmarkSomething(b *testing.B)的函数，然后你就可以开始了。
testing包的文档提供了更详细的说明，但基本上在编写完你的_test.go文件后，只需运行它们，启用基准测试，并针对你的问题打开-benchmem选项：
go test -bench=. -benchmem
这样就能得到你想要的结果。
英文:
That's not really how you use the testing package. Just create a file called something_test.go and write a function called func BenchmarkSomething(b *testing.B) and you're good to go.
The documentation of the testing package goes into a lot more detail, but basically after you write your _test.go files, you just run them, enable benchmarks, and specific to your question, turn on -benchmem:
go test -bench=. -benchmem
That should give you what you're looking for.
答案2
得分: 9
实际上很简单：
- 使用
runtime.ReadMemStats(&m)将memstats读入m中 - 调用
f() - 再次将
memstats读入m2中 - 计算
m和m2之间的差异
例如：
var m1, m2 runtime.MemStats
runtime.GC()
runtime.ReadMemStats(&m1)
f()
runtime.ReadMemStats(&m2)
fmt.Println("总内存分配：", m2.TotalAlloc - m1.TotalAlloc)
fmt.Println("mallocs次数：", m2.Mallocs - m1.Mallocs)
英文:
Actually it's very simple:
- Read memstats with
runtime.ReadMemStats(&m)intom - Invoke
f() - Read memstats again into
m2 - Calculate diff between
mandm2
For example:
var m1, m2 runtime.MemStats
runtime.GC()
runtime.ReadMemStats(&m1)
f()
runtime.ReadMemStats(&m2)
fmt.Println("total:", m2.TotalAlloc - m1.TotalAlloc)
fmt.Println("mallocs:", m2.Mallocs - m1.Mallocs)
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