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So it's deterministic. I got the same numbers.

On the Playground or on your PC? The Playground has an execution cache, so the same input code always gives the same (thus "deterministic") result.

Ah OK, it was on the playground. Is it deterministic when not cached?

It is not deterministic on playground if it is not cached.

You can add dummy code to the file to break free from the cache.

Adding some white space also does the trick