News for hackers. Stuff that matters.

A comment on JEP Draft: Deprecate memory-access methods in sun.misc.unsafe for removal. Parent comment

Re:JEP Draft: Deprecate memory-access methods in sun.misc.un... by iscoelho on Wednesday January 17, 2024 @03:49AM (#39025081)
These explicit checks are basically what I mean by "convincing the compiler" (and sometimes, it isn't quite convinced!) - Yeah. Not fun at all.

Especially in Java, because "the assembly" can change as the JIT evolves. What is optimized today may not be tomorrow.

[ Parent | on HN ]
Re:JEP Draft: Deprecate memory-access methods in sun.misc.un... by xxs on Wednesday January 17, 2024 @03:56AM (#39025146)
Some 12-13y back (time does fly) Cliff Click (hotspot architect) had a series of blogs on optimizations, incl. the lattice checks (i.e. within bounds). Was quite insightful. It was called: "Too Much Theory" [0]

>What is optimized today may not be tomorrow.

Exactly. (Also most developers will have exceptionally hard time maintaining such code)

[0]: https://web.archive.org/web/20120328222841/http://cliffc.org...

[ Parent | on HN ]