https://doc.rust-lang.org/beta/nightly-rustc/rustc_type_ir/data_structures/enum.SsoHashMap.html
SsoHashMap in rustc_type_ir::data_structures - Rust
Small-storage-optimized implementation of a map.
ir datarustctypestructures
https://doc.rust-lang.org/nightly/nightly-rustc/rustc_infer/infer/canonical/ir/data_structures/enum.SsoHashMap.html
SsoHashMap in rustc_infer::infer::canonical::ir::data_structures - Rust
Small-storage-optimized implementation of a map.
ir datarustcinfercanonicalstructures