diff --git a/bench/Bench.hs b/bench/Bench.hs
--- a/bench/Bench.hs
+++ b/bench/Bench.hs
@@ -1,5 +1,6 @@
 module Main (main) where
 
+-- TODO: bench bzlib?
 import qualified Codec.Compression.BZip as BZ2
 import           Criterion.Main
 import qualified Data.ByteString.Lazy   as BSL
diff --git a/bz2.cabal b/bz2.cabal
--- a/bz2.cabal
+++ b/bz2.cabal
@@ -1,6 +1,6 @@
 cabal-version:      1.18
 name:               bz2
-version:            1.0.0.0
+version:            1.0.0.1
 license:            BSD3
 license-file:       LICENSE
 copyright:          Copyright: (c) 2020 Vanessa McHale
@@ -38,6 +38,7 @@
 
 library
     exposed-modules:  Codec.Compression.BZip
+    cc-options:       -O3
     c-sources:
         cbits/bzlib.c
         cbits/randtable.c