I quickly searched the repository and didn't find any mention of Intel TBB.

TBB contains drop-in replacement for built-in memory allocator (malloc/new), so it should be easy to try: https://www.intel.com/content/www/us/en/develop/documentation/onetbb-documentation/top/onetbb-developer-guide/memory-allocation/automically_replacing_malloc.html

Note that this memory allocator was specifically optimized for multithreading and many small objects: https://www.intel.com/content/www/us/en/develop/documentation/onetbb-documentation/top/onetbb-developer-guide/memory-allocation.html

Finally, it seems that Intel TBB is developed mainly by russian developers, and have its own support forum: https://github.com/oneapi-src/oneTBB/discussions

For @alexey-milovidov