binarytrees - uninformative results

I compare results for golang & c#.
golang slower than c# but use less memory.

In this benchmark allocates big amount of memory so result is highly dependents on the aggressiveness of the garbage collection.

For golang can use env variable GOGC. by default it = 100
if set GOGC=300, the result becomes close to c#.

For testing need set garbage collection settings to approximatively same aggressiveness.