ThreadSanitizer: huge memory consumption and unnecessary sleep

[ArtemNosenko]

I tries to sanitize my program's UT with Asan, UBsan, Tsan. Asan and UBsan work fine, but at some point (on two specific UTs) memory consumption starts to grow, 10-20 second pauses appears between test function calls and after 2-3 minutes my PC runs out of memory. I tried atexit_sleep_ms, flush_memory_ms, memory_limit_mb - nothing worked.
Some additional info:

Ubuntu 22.04
Ubuntu clang version 18.1.8

stack - in addition to the usual threads, new ones appeared - number 5 on the screenshot and 15 threads with identical stacks (numbers 7 - 22):

memprof - after line 2377 nmap starts to grow very fast:
tsan.memprof.txt

Also tried to run my UT compiled with clang-14 - and it was much slower than clang-18, but without huge memory consumption(with vm.mmap_rnd_bits=28 and randomize_va_space=0)