Prefer bitwise OR over addition for UTF-8 multi-byte encoding

FasterXML / jackson-core

Core part of Jackson that defines Streaming API as well as basic shared abstractions

Apache License 2.0

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Prefer bitwise OR over addition for UTF-8 multi-byte encoding #1220

Closed cowtowncoder closed 5 months ago

cowtowncoder commented 8 months ago

(contributed by @xtonik)

cowtowncoder commented 8 months ago

@xtonik Are bitwise logical operators faster than basic arithmetic (add, sub)? Back in the days costs were similar if not identical, but I haven't really been following on how CPU instruction costs fare these days.

So, basically, I assume this is expected to improve performance, but not sure how to verify: could build a micro-benchmark I guess but was guessing you have more information onthis.

cowtowncoder commented 7 months ago

@xtonik Forgot to follow up on this -- do you have something (tests, articles) to support the idea that this helps speed up processing?