diff --git a/.cargo/config.toml b/.cargo/config.toml
new file mode 100644
index 0000000..ddff440
--- /dev/null
+++ b/.cargo/config.toml
@@ -0,0 +1,2 @@
+[build]
+rustflags = ["-C", "target-cpu=native"]
diff --git a/.gitignore b/.gitignore
index fe6df09..cd9710f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@
 measurements.txt
 flamegraph.svg
 perf.data
+perf.data.old
diff --git a/Cargo.toml b/Cargo.toml
index d56df25..d649057 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -14,3 +14,5 @@ path = "src/generate.rs"
 
 [profile.release]
 debug = true
+lto = "fat"
+codegen-units = 1
diff --git a/benchmark.txt b/benchmark.txt
new file mode 100644
index 0000000..d1111e2
--- /dev/null
+++ b/benchmark.txt
@@ -0,0 +1,4 @@
+128  basic
+110 lto, coden, abort
+107 nightly, build-std
+109 native cpu (doesn't seem to work)