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added x64 architecture fix to README #25

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added x64 architecture fix to README #25

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15 changes: 10 additions & 5 deletions README.md
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Expand Up @@ -350,13 +350,18 @@ Did you quit your app gracefully, such as with cmd-Q? If you instead just hit ST

### My traces appear empty

You probably went over the memory size that Perfetto is set to use by default (80MB).
1. Memory size

If you are doing intensive profiling with lots of functions being called many times, you'll probably want to increase this limit. You can do this by passing the number of `kb` you want to `beginSession`:
The memory size that Perfetto is set to use by default is 80MB.
If you are doing intensive profiling with lots of functions being called many times, you'll probably want to increase this limit. You can do this by passing the number of `kb` you want to `beginSession`:

```
MelatoninPerfetto::get().beginSession(300000); # 300MB
```

```
MelatoninPerfetto::get().beginSession(300000); # 300MB
```
2. Architecture
If you are on arm, try changing the target architecture in your cmake options: `-DCMAKE_OSX_ARCHITECTURES="x86_64"`

### I keep forgetting to turn perfetto off!

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