10 files changed, 56 insertions, 19 deletions
diff --git a/bench/ffi/plus100/README.md b/bench/ffi/plus100/README.md
index 418e7bd34..954eaa607 100644
--- a/bench/ffi/plus100/README.md
+++ b/bench/ffi/plus100/README.md
@@ -1,6 +1,6 @@
 ## FFI overhead comparison
 
-This compares the cost of a simple function call going from JavaScript to native code and back in:
+This compares the cost of simple function calls going from JavaScript to native code and back in:
 
 - Bun v0.0.79
 - napi.rs (Node v17.7.1)
@@ -18,10 +18,20 @@ To run the benchmark:
 bun bench
 ```
 
+**add 100 to a number**:
+
 | Overhead | Using   | Version | Platform        |
 | -------- | ------- | ------- | --------------- |
 | 7ns      | bun:ffi | 0.0.79  | macOS (aarch64) |
 | 18ns     | napi.rs | 17.7.1  | macOS (aarch64) |
 | 580ns    | Deno    | 1.21.1  | macOS (aarch64) |
 
-The native [function](./plus100.c) called in Deno & Bun are the same. The function called with napi.rs is from napi's official [package-template](https://github.com/napi-rs/package-template)
+**function that does nothing**:
+
+| Overhead | Using   | Version | Platform        |
+| -------- | ------- | ------- | --------------- |
+| 3ns      | bun:ffi | 0.0.79  | macOS (aarch64) |
+| 15ns     | napi.rs | 17.7.1  | macOS (aarch64) |
+| 431ns    | Deno    | 1.21.1  | macOS (aarch64) |
+
+The native [functions](./plus100.c) called in Deno & Bun are the same. The function called with napi.rs is based on napi's official [package-template](https://github.com/napi-rs/package-template) in https://github.com/Jarred-Sumner/napi-plus100
diff --git a/bench/ffi/plus100/download-napi-plus100.sh b/bench/ffi/plus100/download-napi-plus100.sh
index 9cd226857..431fa88b3 100644
--- a/bench/ffi/plus100/download-napi-plus100.sh
+++ b/bench/ffi/plus100/download-napi-plus100.sh
@@ -1,7 +1,7 @@
 #!/bin/bash
 
 rm -rf plus100-napi
-git clone https://github.com/napi-rs/package-template plus100-napi  --depth=1
+git clone https://github.com/Jarred-Sumner/napi-plus100 plus100-napi --depth=1
 cd plus100-napi
 npm install
 npm run build
diff --git a/bench/ffi/plus100/package.json b/bench/ffi/plus100/package.json
index ba7ef1fd7..6ac5d60e0 100644
--- a/bench/ffi/plus100/package.json
+++ b/bench/ffi/plus100/package.json
@@ -5,8 +5,8 @@
     "bench-deno": "deno run  --allow-ffi --unstable -A plus100.deno.js",
     "napi-setup": "bash download-napi-plus100.sh",
     "bench-napi": "node plus100.napi.mjs",
-    "bench-bun": "bun run ./plus100.bun.js",
+    "bench-bun": "bun ./plus100.bun.js",
     "compile": "clang -mtune=native -O3 -shared ./plus100.c -o plus100.dylib",
-    "bench": "echo -e '\n--- Bun:\n' && bun run bench-bun && echo -e '\n--- Node:\n' && bun run bench-napi && echo -e '\n--- Deno:\n' && bun run bench-deno"
+    "bench": "bun run bench-bun && bun run bench-napi && bun run bench-deno"
   }
 }
diff --git a/bench/ffi/plus100/plus100.bun.js b/bench/ffi/plus100/plus100.bun.js
index ca4bf0f64..3ddaff975 100644
--- a/bench/ffi/plus100/plus100.bun.js
+++ b/bench/ffi/plus100/plus100.bun.js
@@ -1,19 +1,30 @@
 import { run, bench, group, baseline } from "mitata";
-import { dlopen } from "bun:ffi";
+import { dlopen, suffix } from "bun:ffi";
 
 const {
-  symbols: { plus100: plus100 },
+  symbols: {
+    plus100: { native: plus100 },
+    noop,
+  },
   close,
-} = dlopen("./plus100.dylib", {
+} = dlopen(`./plus100.${suffix}`, {
   plus100: {
-    params: ["int32_t"],
+    args: ["int32_t"],
     returns: "int32_t",
   },
+  noop: {
+    args: [],
+  },
 });
-bench("plus100(1) (Bun FFI)", () => {
+bench("plus100(1) ", () => {
   plus100(1);
 });
 
+bench("noop() ", () => {
+  noop();
+});
+
 // collect option collects benchmark returned values into array
 // prevents gc and can help with jit optimizing out functions
-run({ collect: false, percentiles: true });
+await run({ collect: false, percentiles: true });
+console.log("\n");
diff --git a/bench/ffi/plus100/plus100.c b/bench/ffi/plus100/plus100.c
index c5b7933ea..bdecda7e0 100644
--- a/bench/ffi/plus100/plus100.c
+++ b/bench/ffi/plus100/plus100.c
@@ -2,5 +2,7 @@
 #include <stdint.h>
 
 int32_t plus100(int32_t a);
-
 int32_t plus100(int32_t a) { return a + 100; }
+
+void noop(void);
+void noop(void) {}
+\ No newline at end of file
diff --git a/bench/ffi/plus100/plus100.deno.js b/bench/ffi/plus100/plus100.deno.js
index e6104efdd..83e4fc317 100644
--- a/bench/ffi/plus100/plus100.deno.js
+++ b/bench/ffi/plus100/plus100.deno.js
@@ -1,18 +1,26 @@
 import { run, bench, group, baseline } from "https://esm.sh/mitata";
 
 const {
-  symbols: { plus100: plus100 },
+  symbols: { plus100: plus100, noop },
   close,
 } = Deno.dlopen("./plus100.dylib", {
   plus100: {
     parameters: ["i32"],
     result: "i32",
   },
+  noop: {
+    parameters: [],
+    result: "void",
+  },
 });
-bench("plus100(1) (Deno FFI)", () => {
+bench("plus100(1) ", () => {
   plus100(1);
 });
 
+bench("noop() ", () => {
+  noop();
+});
+
 // collect option collects benchmark returned values into array
 // prevents gc and can help with jit optimizing out functions
-run({ collect: false, percentiles: true });
+await run({ collect: false, percentiles: true });
diff --git a/bench/ffi/plus100/plus100.dylib b/bench/ffi/plus100/plus100.dylib
index 030d1afef..7b5ec3962 100755
--- a/bench/ffi/plus100/plus100.dylib
+++ b/bench/ffi/plus100/plus100.dylib
diff --git a/bench/ffi/plus100/plus100.napi.mjs b/bench/ffi/plus100/plus100.napi.mjs
index f4adda8d3..aa8d2636f 100644
--- a/bench/ffi/plus100/plus100.napi.mjs
+++ b/bench/ffi/plus100/plus100.napi.mjs
@@ -2,9 +2,15 @@ import { bench, run } from "mitata";
 
 import module from "module";
 
-const { plus100 } = module.createRequire(import.meta.url)("./plus100-napi");
+const { plus100, noop } = module.createRequire(import.meta.url)(
+  "./plus100-napi"
+);
 
-bench("plus100(1) (napi.rs)", () => {
+bench("plus100(1) ", () => {
   plus100(1);
 });
-run({ collect: false, percentiles: true });
+bench("noop() ", () => {
+  noop();
+});
+await run({ collect: false, percentiles: true });
+console.log("\n");
diff --git a/bun.lockb b/bun.lockb
index 4e2475280..b4fe11747 100755
--- a/bun.lockb
+++ b/bun.lockb
diff --git a/src/javascript/jsc/api/ffi.zig b/src/javascript/jsc/api/ffi.zig
index ce162f890..6e659837e 100644
--- a/src/javascript/jsc/api/ffi.zig
+++ b/src/javascript/jsc/api/ffi.zig
@@ -418,7 +418,7 @@ pub const FFI = struct {
         // var function
         var return_type = ABIType.@"void";
 
-        if (value.get(global, "return_type")) |ret_value| brk: {
+        if (value.get(global, "returns")) |ret_value| brk: {
             if (ret_value.isAnyInt()) {
                 const int = ret_value.toInt32();
                 switch (int) {