Yeah, on the z80 "jp" is generally faster if you're making the jump but one byte larger, "jr" is typically slower (except when using the conditional version where the condition is false/no jump is taken) but one byte smaller. It's a convoluted case of the classic "size vs. speed".
Like Hot_Dog posted, i like the formatting of the ASM in 28 Days instruction set and that's my go-to reference when i need to confirm how many T-states an instruction takes.
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