You'll have to test it on your architecture if you really want to know.
But in general, on modern processors, there is minimal cost for an unconditional jump. It's basically pretty much free apart from a very small amount of instruction cache overhead. It will probably get executed in parallel with neighbouring instructions so might not even cost you a clock cycle. This is because the jump can be executed by one of several parallel [execution units][1].
Look at it this way - a single read of main memory is probably 100-200 times more expensive.
It's a subset of [branch prediction][2] more generally, but there no risk of a branch misprediction so you are safe from having to flush the [instruction pipeline][3], which is the main cost associated with conditional jumps.
[1]:
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