for WebAssembly can be natively decoded much faster than JavaScript can be parsed (experiments show more than 20× faster). On mobile, large compiled codes can easily take 20–40 seconds just to parse, so native decoding (especially when combined with other techniques like streaming for better-than-gzip compression) is critical to providing a good cold- load user experience. from the FAQ of WebAssembly
is designed to be encoded in a size- and load-time- efficient binary format. WebAssembly aims to execute at native speed by taking advantage of common hardware capabilities available on a wide range of platforms.
is designed to be encoded in a size- and load-time- efficient binary format. WebAssembly aims to execute at native speed by taking advantage of common hardware capabilities available on a wide range of platforms. Safe WebAssembly describes a memory-safe, sandboxed execution environmentthat may even be implemented inside existing JavaScript virtual machines. When embedded in the web, WebAssembly will enforce the same- origin and permissions security policies of the browser.
is designed to be encoded in a size- and load-time- efficient binary format. WebAssembly aims to execute at native speed by taking advantage of common hardware capabilities available on a wide range of platforms. Safe WebAssembly describes a memory-safe, sandboxed execution environment that may even be implemented inside existing JavaScript virtual machines. When embedded in the web, WebAssembly will enforce the same- origin and permissions security policies of the browser. Open and debuggable WebAssembly is designed to be pretty-printedin a textual format for debugging, testing, experimenting, optimizing, learning, teaching, and writing programs by hand. The textual format will be used when viewing the source of Wasm modules on the web.
is designed to be encoded in a size- and load-time- efficient binary format. WebAssembly aims to execute at native speed by taking advantage of common hardware capabilities available on a wide range of platforms. Safe WebAssembly describes a memory-safe, sandboxed execution environment that may even be implemented inside existing JavaScript virtual machines. When embedded in the web, WebAssembly will enforce the same- origin and permissions security policies of the browser. Open and debuggable WebAssembly is designed to be pretty-printed in a textual format for debugging, testing, experimenting, optimizing, learning, teaching, and writing programs by hand. The textual format will be used when viewing the source of Wasm modules on the web. Part of the open web platform WebAssembly is designed to maintain the versionless, feature-tested, and backwards-compatible nature of the web. WebAssembly modules will be able to call into and out of the JavaScript context and access browser functionality through the same Web APIs accessible from JavaScript. WebAssembly also supports non-webembeddings.
Group started • June 2015 - The first public announcement • March 2016 - Definition of core feature with multiple interoperable implementations • October 2016 - Browser Preview announced with multiple interoperable implementations • February 2017 - Official logo chosen • March 2017 - Cross-browser consensus and end of Browser Preview
existing JavaScript world. This ranges from technical things, such as interoperability and sharing the security policies (same-origin), to tooling integration, such as as supporting the View Source functionality of web browsers.
MVP is not Most Valuable Professional • MVP is Minimal Viable Product • The MVP of WebAssembly does not support garbage collection • Rely on LLVM (one of the most used set of compiler tools)
Proposed spec text available Threads 1073 in progress Feature proposal Fixed-width SIMD 1075 in progress Feature proposal Exception handling 1078 in progress Feature proposal Garbage collection 1079 in progress Feature proposal Bulk memory operations 1114 in progress Feature proposal Web Content Security Policy 1122 in progress Pre-proposal ECMAScript module integration 1087 in progress Feature proposal Tail Call 1144 in progress Feature proposal Non-trapping float-to-int conversions 1143 in progress Implementation phase Multi-value 1146 in progress Implementation phase Host bindings 1148 in progress Feature proposal Sign-extension operators 1178 in progress Implementation phase Import/Export Mutable Globals 1179 in progress Implementation phase Type Reflection for WebAssembly JavaScript API 1181 in progress Feature proposal Unmanaged closures 1182 in progress Feature proposal JavaScript BigInt to WebAssembly i64 integration 1186 in progress Proposed Spec Text Available Custom Annotation Syntax in the Text Format 1192 in progress Feature proposal
window) { // Add memory object to the import object var memObj = new WebAssembly.Memory({initial: 256, maximum: 256}); var importObj = { env: { memory: memObj} }; // Set the import object in instantiateStreaming WebAssembly.instantiateStreaming(fetch('scalarAdd.wasm'), importObj) .then(result => { // Get the addresses of the input array offset = result.instance.exports._getInputArrayOffset(); // Create and initialize array var inputArray = new Uint32Array(memObj.buffer, offset, 8); inputArray.fill(6); // Compute the product product = result.instance.exports._scalar_add(); document.getElementById('wasm').innerHTML = 'Scalar add product: ' + product; }); }
window) { // Add memory object to the import object var memObj = new WebAssembly.Memory({initial: 256, maximum: 256}); var importObj = { env: { memory: memObj} }; // Set the import object in instantiateStreaming WebAssembly.instantiateStreaming(fetch('scalarAdd.wasm'), importObj) .then(result => { // Get the addresses of the input array offset = result.instance.exports._getInputArrayOffset(); // Create and initialize array var inputArray = new Uint32Array(memObj.buffer, offset, 8); inputArray.fill(6); // Compute the product product = result.instance.exports._scalar_add(); document.getElementById('wasm').innerHTML = 'Scalar add product: ' + product; }); }
window) { // Add memory object to the import object var memObj = new WebAssembly.Memory({initial: 256, maximum: 256}); var importObj = { env: { memory: memObj} }; // Set the import object in instantiateStreaming WebAssembly.instantiateStreaming(fetch('scalarAdd.wasm'), importObj) .then(result => { // Get the addresses of the input array offset = result.instance.exports._getInputArrayOffset(); // Create and initialize array var inputArray = new Uint32Array(memObj.buffer, offset, 8); inputArray.fill(6); // Compute the product product = result.instance.exports._scalar_add(); document.getElementById('wasm').innerHTML = 'Scalar add product: ' + product; }); }
window) { // Add memory object to the import object var memObj = new WebAssembly.Memory({initial: 256, maximum: 256}); var importObj = { env: { memory: memObj} }; // Set the import object in instantiateStreaming WebAssembly.instantiateStreaming(fetch('scalarAdd.wasm'), importObj) .then(result => { // Get the addresses of the input array offset = result.instance.exports._getInputArrayOffset(); // Create and initialize array var inputArray = new Uint32Array(memObj.buffer, offset, 8); inputArray.fill(6); // Compute the product product = result.instance.exports._scalar_add(); document.getElementById('wasm').innerHTML = 'Scalar add product: ' + product; }); }
window) { // Add memory object to the import object var memObj = new WebAssembly.Memory({initial: 256, maximum: 256}); var importObj = { env: { memory: memObj} }; // Set the import object in instantiateStreaming WebAssembly.instantiateStreaming(fetch('scalarAdd.wasm'), importObj) .then(result => { // Get the addresses of the input array offset = result.instance.exports._getInputArrayOffset(); // Create and initialize array var inputArray = new Uint32Array(memObj.buffer, offset, 8); inputArray.fill(6); // Compute the product product = result.instance.exports._scalar_add(); document.getElementById('wasm').innerHTML = 'Scalar add product: ' + product; }); }
window) { // Add memory object to the import object var memObj = new WebAssembly.Memory({initial: 256, maximum: 256}); var importObj = { env: { memory: memObj} }; // Set the import object in instantiateStreaming WebAssembly.instantiateStreaming(fetch('scalarAdd.wasm'), importObj) .then(result => { // Get the addresses of the input array offset = result.instance.exports._getInputArrayOffset(); // Create and initialize array var inputArray = new Uint32Array(memObj.buffer, offset, 8); inputArray.fill(6); // Compute the product product = result.instance.exports._scalar_add(); document.getElementById('wasm').innerHTML = 'Scalar add product: ' + product; }); }
in window) { // Set the import object in instantiateStreaming WebAssembly.instantiateStreaming(fetch('wasm /classes.wasm')) .then(result => { //the Purpse of Life is: result = result.instance.exports.thePurposeOfLife(); document.getElementById('wasm').innerHTML = 'The Purpose of life according to teavm wasm from java: ' + result; }); } HTML: <html> <head> <meta charset='UTF-8'> <script src="output.js"></script> </head> <body> <label id='wasm'></label> </body> </html>
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