diff --git a/host/src/process/cache.rs b/host/src/process/cache.rs
index bc81b55..df70a73 100644
--- a/host/src/process/cache.rs
+++ b/host/src/process/cache.rs
@@ -57,7 +57,8 @@ impl Compiler {
         let _ = rustls::crypto::aws_lc_rs::default_provider().install_default();
         let mut config = wasmtime::Config::new();
         config.epoch_interruption(true);
-        config.cranelift_opt_level(wasmtime::OptLevel::None);
+        // Keep Cranelift's default optimization: compiles are cached per content, and guests run
+        // many times. OptLevel::None saved only 12.7% of compile time (T15) but slows every run.
         let mut cache = wasmtime::CacheConfig::new();
         cache.with_directory(directory);
         config.cache(Some(wasmtime::Cache::new(cache)?));