TCMalloc is used at run time in 5 crates (of which 5 optionally).

Depender (with downloads and own rev deps) TCMalloc version
33K 11 grcov optional ^0.3
550 shadowsocks-rust optional ^0.3
500 syd optional ^0.3
300 vproxy optional ^0.3.0
1 fnntw optional ^0.3.0