ZVM Test Benchmarking

[DerelictDrone]

Provides some information for the execution time and other stats from the ZVM tests, plus a test that runs a complex user-made program for benchmarking purposes.

Use of benchmarking and outputs from benchmarking are controlled by the convar ZCPU_TESTS_BENCHMARKING
0 = No benchmarking hooks, no benchmarking information other than the time it took to complete the full test run. (default)
> 0 Benchmarking hooks are applied, and you'll get a final summary of the benchmark information collected
> 1 Same as above but after each test the benchmark information is printed for the test, for every VM it initialized.

Example of benchmark setting > 0

Example of benchmark setting > 1

Benchmark information is collected per test, and has as follows.

PrecompileStringSize -- Total precompile string size
TotalJitBytecodeSize -- Total jit bytecode compiled
BiggestPrecompileStringSize -- The biggest single precompile string
BiggestJitBlock -- The biggest single block
PrecompileSteps -- Number of steps in precompile
Precompiles -- Number of precompile blocks started / finished
FinalCompiledCount -- Final amount of precompiled blocks at the end of test.
ExecutionTime -- Total execution time during VM:Step
LongestStepExecutionTime -- Longest execution time during VM:Step
ExecutionSteps -- How many execution steps were performed by this VM