From 031c6b6035392f91777872360eb4b9d1a2f2041d Mon Sep 17 00:00:00 2001
From: Kevin Deng <sxzz@sxzz.moe>
Date: Sat, 13 Jun 2026 18:25:05 +0900
Subject: [PATCH] perf: hoist instantiate function in helpers module

---
 src/helper.ts                         | 9 +++++----
 tests/__snapshots__/init/browser.snap | 7 ++++---
 tests/__snapshots__/init/neutral.snap | 7 ++++---
 tests/__snapshots__/init/node.snap    | 7 ++++---
 4 files changed, 17 insertions(+), 13 deletions(-)

diff --git a/src/helper.ts b/src/helper.ts
index e687d63..bb388a9 100644
--- a/src/helper.ts
+++ b/src/helper.ts
@@ -85,11 +85,12 @@ function envModule(env: TargetEnv) {
 }
 
 export const getHelpersModule = (env: TargetEnv) => `
+function instantiate(source, imports, stream) {
+  const instantiate = WebAssembly[stream ? 'instantiateStreaming' : 'instantiate']
+  return instantiate(source, imports).then(({ instance }) => instance)
+}
+
 export function loadWasmModule(sync, fileUrl, src, imports) {
-  function instantiate(source, imports, stream) {
-    const instantiate = stream ? WebAssembly.instantiateStreaming : WebAssembly.instantiate;
-    return instantiate(source, imports).then(({ instance }) => instance)
-  }
 
   ${envModule(env)}
 
diff --git a/tests/__snapshots__/init/browser.snap b/tests/__snapshots__/init/browser.snap
index 8b3ca75..58a85e3 100644
--- a/tests/__snapshots__/init/browser.snap
+++ b/tests/__snapshots__/init/browser.snap
@@ -2,10 +2,11 @@
 [BINARY]
 // init.js
 //#region \0wasm-helpers.js
+function instantiate(source, imports, stream) {
+	const instantiate = WebAssembly[stream ? "instantiateStreaming" : "instantiate"];
+	return instantiate(source, imports).then(({ instance }) => instance);
+}
 function loadWasmModule(sync, fileUrl, src, imports) {
-	function instantiate(source, imports, stream) {
-		return (stream ? WebAssembly.instantiateStreaming : WebAssembly.instantiate)(source, imports).then(({ instance }) => instance);
-	}
 	let buf = null;
 	if (fileUrl) return instantiate(fetch(fileUrl), imports, true);
 	const raw = globalThis.atob(src);
diff --git a/tests/__snapshots__/init/neutral.snap b/tests/__snapshots__/init/neutral.snap
index b445425..d99f018 100644
--- a/tests/__snapshots__/init/neutral.snap
+++ b/tests/__snapshots__/init/neutral.snap
@@ -2,10 +2,11 @@
 [BINARY]
 // init.js
 //#region \0wasm-helpers.js
+function instantiate(source, imports, stream) {
+	const instantiate = WebAssembly[stream ? "instantiateStreaming" : "instantiate"];
+	return instantiate(source, imports).then(({ instance }) => instance);
+}
 function loadWasmModule(sync, fileUrl, src, imports) {
-	function instantiate(source, imports, stream) {
-		return (stream ? WebAssembly.instantiateStreaming : WebAssembly.instantiate)(source, imports).then(({ instance }) => instance);
-	}
 	let buf = null;
 	const isNode = typeof process !== "undefined" && process.versions != null && process.versions.node != null;
 	if (fileUrl && isNode) {
diff --git a/tests/__snapshots__/init/node.snap b/tests/__snapshots__/init/node.snap
index 1664810..258cfa8 100644
--- a/tests/__snapshots__/init/node.snap
+++ b/tests/__snapshots__/init/node.snap
@@ -2,10 +2,11 @@
 [BINARY]
 // init.js
 //#region \0wasm-helpers.js
+function instantiate(source, imports, stream) {
+	const instantiate = WebAssembly[stream ? "instantiateStreaming" : "instantiate"];
+	return instantiate(source, imports).then(({ instance }) => instance);
+}
 function loadWasmModule(sync, fileUrl, src, imports) {
-	function instantiate(source, imports, stream) {
-		return (stream ? WebAssembly.instantiateStreaming : WebAssembly.instantiate)(source, imports).then(({ instance }) => instance);
-	}
 	let buf = null;
 	if (fileUrl) {
 		const { readFile } = process.getBuiltinModule("fs/promises");
-- 
2.51.2