You can bypass the serialisation cost by using the transferList for ArrayBuffer instances, which is used by typed arrays i.e. Int32Array, Float64Array etc. i.e

You can bypass the serialisation cost by using the transferList for ArrayBuffer instances, which is used by typed arrays i.e. Int32Array, Float64Array etc. i.e. self.postMessage(myTypedArray, [myTypedArray.buffer]) I used this approach to generated geometry within a web worker for a WebGL project. Only downside is the web worker that initialised the array will lose ownership of the buffer and will have to create a new one to pass more information. https://developer.mozilla.org/en/docs/Web/API/Worker/postMessage https://developer.mozilla.org/en/docs/Web/API/Worker/postMes...