Merge pull request rust-lang#1 from bluss/32-bit-merge

Optimize for "small" maps (capacity fits in 32 bits)

Author: bluss

Cargo.toml

@@ -19,5 +19,9 @@ quickcheck = "0.3.1"
 fnv = "1.0"
 lazy_static = "0.2"
 
+[features]
+# for testing only, of course
+test_low_transition_point = []
+
 [profile.bench]
 debug = true