BenchmarkJsArrayQuickSort10000 doesn't finish when running all benchmarks

[jclc]

Attempting to run all benchmarks with go test -bench . in the root folder stops at BenchmarkJsArrayQuickSort10000, when the benchmark will run forever without finishing. Memory usage jumps up to 1.3GB and CPU usage to 100% on one core.

[jclc]

Trying the benchmark with smaller arrays seems to work, it just takes insanely long. Far longer than is normal for quick sort.

[stevenh]

The cause of this is shear number of allocation requests due to the why lots of temporary structs that are created when running the JS sort code.

When running this code with just 500 items it allocates 19GB.

I have a some work in progress code which uses sync.Pool to create caches that can be reused, but it's not a simple task with the current design, potentially resulting in more fragile code.

In the mean time I've reduced the count from 10k to 500 which results in a reasonable time to run.

[stevenh]

Keeping this open to track progress on improving memory usage.