Minimize use of tr_ptrArray in certain critical parts of the code

[wereHamster]

Some parts (most prominent in bandwidth.c, but other parts are affected as well) create and destroy ptr arrays many times a second. And due to how the ptr array manages memory that can lead to noticeable slowdowns (up to a point where most of the time is spent with managing memory rather than servicing network sockets).

Try to minimize use of tr_ptrArray in parts where other data structure (lists, hash tables etc) make more sense.

[charles]

I'm open to this idea, but do you have any profiling data that shows where transmission is spending most of its time managing memory instead of servicing network sockets?

[sadface]

I don't bring you a revolutionary data structure. It's just a minimal patch for tr_ptrArray...

[livings124]

In the end will that have any impact? It's just avoiding a memmove of 0.

[charles]

It makes the code a little cleaner anyway, regardless of whether memmove(a,b,0) is free or not..

[charles]

Accepted to 1.9x in r10348

Accepted to trunk in r10349

[charles]

Closing due to lack of information on the cost of tr_ptrArray. Please feel free to reopen this ticket when more information is available.