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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@DrAzzy
Oh yeah - Gordon fixed some issues with waveform recently, that'd be that.
It might be loading the data off the SD card that's slowing it down? Also, what's the default SPI clock speed? I wonder if it's slow enough that the SPI data transfer time is an issue? You could try specifying a higher baud, and see if that helps.
Can you post the latest code you're using?