diff --git a/CHANGELOG b/CHANGELOG
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,5 +1,8 @@
 # Changelog
 
+- 0.2.1 (2025-12-28)
+  * Adds an 'llvm' build flag and is now tested with GHC 9.10.3.
+
 - 0.2.0 (2025-03-10)
   * Fix bug in which inputs with uppercase hex characters failed to
     decode.
diff --git a/bench/Main.hs b/bench/Main.hs
--- a/bench/Main.hs
+++ b/bench/Main.hs
@@ -1,4 +1,5 @@
 {-# OPTIONS_GHC -fno-warn-unused-imports #-}
+{-# LANGUAGE BangPatterns #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE PackageImports #-}
 
@@ -17,11 +18,16 @@
   ]
 
 minimal_encode :: Benchmark
-minimal_encode = bench "ppad-base16" $ nf B16.encode (BS.replicate 1024 0x00)
+minimal_encode =
+  let !a = BS.replicate 1024 0x00
+  in  bench "ppad-base16/encode" $
+        nf B16.encode a
 
 minimal_decode :: Benchmark
-minimal_decode = bench "ppad-base16" $ nf B16.decode
-  (B16.encode (BS.replicate 512 0x00))
+minimal_decode =
+  let !a = B16.encode (BS.replicate 512 0x00)
+  in  bench "ppad-base16/decode" $
+        nf B16.decode a
 
 encode :: Benchmark
 encode = bgroup "encode" [
diff --git a/ppad-base16.cabal b/ppad-base16.cabal
--- a/ppad-base16.cabal
+++ b/ppad-base16.cabal
@@ -1,6 +1,6 @@
 cabal-version:      3.0
 name:               ppad-base16
-version:            0.2.0
+version:            0.2.1
 synopsis:           Pure base16 encoding and decoding on bytestrings.
 license:            MIT
 license-file:       LICENSE
@@ -8,11 +8,16 @@
 maintainer:         jared@ppad.tech
 category:           Cryptography
 build-type:         Simple
-tested-with:        GHC == 9.8.1
+tested-with:        GHC == { 9.10.3 }
 extra-doc-files:    CHANGELOG
 description:
   Pure base16 (hexadecimal) encoding and decoding on bytestrings.
 
+flag llvm
+  description: Use GHC's LLVM backend.
+  default:     False
+  manual:      True
+
 source-repository head
   type:     git
   location: git.ppad.tech/base16.git
@@ -22,6 +27,8 @@
   hs-source-dirs:   lib
   ghc-options:
       -Wall
+  if flag(llvm)
+    ghc-options: -fllvm -O2
   exposed-modules:
       Data.ByteString.Base16
   build-depends: