Larger heap, small tweaks

[royvanrijn]

More small tweaks, perf from 775~ to 738~.

Let's see if 512m is enough to run the tests, locally all (incl the big one) runs fine with 64m.

Also some slight tweaks to the code.

Check List:

• [x] Tests pass (./test.sh <username> shows no differences between expected and actual outputs)

• [x] All formatting changes by the build are committed

• [x] Your launch script is named calculate_average_<username>.sh (make sure to match casing of your GH user name) and is executable

• [x] Output matches that of calculate_average_baseline.sh

• [x] For new entries, or after substantial changes: When implementing custom hash structures, please point to where you deal with hash collisions (line number)

• Execution time:

• Execution time of reference implementation:

[gunnarmorling]

Nice, 00:02.157 now.

[gunnarmorling]

Hey @royvanrijn!

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