Use array for tracking memory usage instead of map

[ialbrecht]

Details:

• Any additional locking and synchronization on memory allocation might have negative impact on MT execution.
• std::map has very slow access are requires lock on every access. We can use std::array instead to hold compile time known number of buckets.
• array container has lower access latency and memory overhead.
• We might me able to remove mutex lock on stat collection.

[rkazants]

build_jenkins

[rkazants]

Hi @ialbrecht, any data with concrete numbers on how it can affect MT execution in your case?

[ialbrecht]

Hi @ialbrecht, any data with concrete numbers on how it can affect MT execution in your case?

We had benchmarks were memory allocation was on the critical performance path and we were looking at all possible ways to optimize it.

[vladimir-paramuzov]

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