[html] What's the best way to set a single pixel in an HTML5 canvas?

putImageData is probably faster than fillRect natively. I think this because the fifth parameter can have different ways to be assigned (the rectangle color), using a string that must be interpreted.

Suppose you're doing that:

context.fillRect(x, y, 1, 1, "#fff")
context.fillRect(x, y, 1, 1, "rgba(255, 255, 255, 0.5)")`
context.fillRect(x, y, 1, 1, "rgb(255,255,255)")`
context.fillRect(x, y, 1, 1, "blue")`

So, the line

context.fillRect(x, y, 1, 1, "rgba(255, 255, 255, 0.5)")`

is the most heavy between all. The fifth argument in the fillRect call is a bit longer string.

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