问题
Imagine that i have a client that only can read base64 images and i want to show that images like a realtime movie (as less latency as possible).
This images are created on server side using nodejs canvas lib. For each image that i send to the client i see the difference between them with imagediff nodejs lib and i only send the difference match image.
In the client side i show it putting the last image exactly over the previous ones (layers).
The problem is that in server side i have the following values that slow down the process:
16ms: after draw canvas:
42ms: imagediff (imagediff nodejs lib)
[100 to 250ms] - toDataUrl (canvas to png base64 - canvas nodejs lib toBuffer().toString('base64'))
The big issue is in 3.
Do you have a different solution for this?
Thanks for your time.
Eduardo
来源：https://stackoverflow.com/questions/13648633/nodejs-canvas-to-base64-png-stream