diff --git a/zjit/Cargo.toml b/zjit/Cargo.toml
index 23f872a470..11cdc333c0 100644
--- a/zjit/Cargo.toml
+++ b/zjit/Cargo.toml
@@ -8,4 +8,16 @@ publish = false         # Don't publish to crates.io
 [lib]
 crate-type = ["staticlib"]
 
+[profile.release]
+# NOTE: --enable-zjit builds use `rustc` without going through Cargo. You
+# might want to update the `rustc` invocation if you change this profile.
+opt-level = 3
+# The extra robustness that comes from checking for arithmetic overflow is
+# worth the performance cost for the compiler.
+overflow-checks = true
+# Generate debug info
+debug = true
+# Use ThinLTO. Much smaller output for a small amount of build time increase.
+lto = "thin"
+
 [dependencies]