[BubRoss]

I don't think this confronts anything I said.

Bulk allocations with custom allocators would either be exactly what I said (low malloc calls) or would just not use malloc at all and use the system memory mapping functions.

The larger point was that an exception being thrown and taking a global lock is not going to tank performance. That would imply that all other threads are trying to take the same lock at the same time and that the thread that gets it holds it for a long time.

Even in the case of malloc, where there could be actual heavy lock contention, this is not always a bottleneck.