message: bench: slim down compile script
  Some of the other regex implementations appear to be having trouble
  compiling. This disables those for now.
diff: exec cargo build \
  --release \
  - --features 're-stdcpp re-boost re-re2 re-onig re-pcre1 re-pcre2 re-rust re-rust-bytes re-tcl re-dphobos-dmd re-dphobos-ldc' \
  + --features 're-re2 re-onig re-pcre1 re-pcre2 re-rust re-rust-bytes re-tcl' \
  "$@"
  