Remove memory profiler

This can't be run in pypy3, and pypy3 is the only thing that seems to be leaking
memory.
Create a partial function if no callback is specified

This seems to be faster.Create a partial function if no callback is specified

This seems to be faster.Create a partial function if no callback is specified

This seems to be faster.Create a partial function if no callback is specified

This seems to be faster.Create a partial function if no callback is specified

This seems to be faster.Create a partial function if no callback is specified

This seems to be faster.Create a partial function if no callback is specified

This seems to be faster.Create a partial function if no callback is specified

This seems to be faster.Create a partial function if no callback is specified

This seems to be faster.