Improve performance of -profile by factor of 10

[Walter Bright]

On 3/25/2013 10:16 PM, deadalnix wrote:
> You can still stop the thread, gather the data you are interested in, and doing
> the whole process while resuming the application, which leverage concurrency.

The obvious difficulty with that is when the app is posting data to the 
profiling thread faster than the latter can process it.

At some point, I'm going to say feel free to write a better profiler! I only 
suggest that it be as easy to use as the existing one.