This document analyzes the bundle size of MoonBit JavaScript output, identifying the main contributors to code size and potential optimization opportunities.
Note: The analyzed output is after terser DCE (Dead Code Elimination) with compress enabled. Unused code has already been removed.
https://github.com/mizchi/js.mbt/blob/main/src/examples/aisdk/main.mbt
Moonbit FFI Core
///|
#external
pub type JsValue
///|
pub fn[T] JsValue::cast(self : JsValue) -> T = "%identity"
| /// original https://github.com/moonbit-community/jmop/blob/main/promise.mbt | |
| ///| | |
| extern "js" fn ffi_promise_resolve(x : Value) -> Value = "(x) => Promise.resolve(x)" | |
| ///| | |
| extern "js" fn ffi_promise_reject(e : Error) -> Value = "(x) => Promise.reject(x)" | |
| ///| | |
| extern "js" fn ffi_promise_then( |
| ```mbt | |
| async fn[T, U] map_async(arr: Array[T], f: async (T) -> U raise?) -> Array[U] raise? { | |
| let res: Array[U] = [] | |
| for item in arr { | |
| res.push(f(item)) | |
| } | |
| res | |
| } | |
| async test { |
///|
extern "js" fn ffi_request_animation_frame(f : () -> Unit) -> Unit =
#|(f) => {
#| if (globalThis.requestAnimationFrame) {
#| requestAnimationFrame(f)
#| } else {
#| setTimeout(f, 0) // fallback
#| }
#|}
| ///| | |
| fnalias @svg.node as svg_node | |
| ///| | |
| fn[M] common_svg_node( | |
| tag_name : String, | |
| new_attrs : Array[@svg.Attribute[M]], | |
| style~ : Array[String]?, | |
| class~ : String?, | |
| id~ : String?, |
| const OPENAI_API_KEY_PATH = "%_%=k"; | |
| const TEMP_PKCE_VERIFIER = "%_%=pk"; | |
| function base64UrlEncode(array: Uint8Array): string { | |
| const base64 = btoa(String.fromCharCode(...array)); | |
| return base64.replace(/\+/g, "-").replace(/\//g, "_").replace(/=/g, ""); | |
| } | |
| type LoginState = | |
| | { |
| /** | |
| Discord Auth for Cloudflare Access | |
| based on https://github.com/Erisa/discord-oidc-worker | |
| # Create discord application | |
| - Get client id and secret | |
| - Set redirect URL to `https://<cloudflare-name>.cloudflareaccess.com/cdn-cgi/access/callback` |
| ///| | |
| test "String to Bytes conversion" { | |
| fn find_index(url : Bytes) -> Int? { | |
| url.find("://") | |
| } | |
| let url = "https://www.example.ocom" | |
| let url_bytes : Bytes = "https://example.com" | |
| inspect(url.find("://"), content="Some(5)") | |
| inspect(find_index("https://example.com"), content="Some(5)") |