Java 14 Feature Spotlight: Records

Re:Java 14 Feature Spotlight: Records by abraxas on Tuesday February 04, 2020 @12:24PM (#22238257)

Thanks, you're right on. That's what I'm after and that's exactly what Java needs to be useful for doing high performance computations in a sane fashion.

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Re:Java 14 Feature Spotlight: Records by seanmceligot on Tuesday February 04, 2020 @03:44PM (#22240740)

I switched to java from c in the mid 90's. I remember thinking how ridiculously wasteful it was to allocate an array on classes one at at time rather than as a block of memory. I think I was using berkeley DB at the time in c and it let you do that.

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Re:Java 14 Feature Spotlight: Records by xxs on Tuesday February 04, 2020 @02:07PM (#22239648)

You have direct buffers but that's that... You can use multiple arrays of primitives, inverting the problem 90%. None of the solutions is optimal, easy to maintain, etc.

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Re:Java 14 Feature Spotlight: Records by abraxas on Tuesday February 04, 2020 @07:11PM (#22242621)

Yes there is also the sun.misc.Unsafe class but of course that's skating on thin ice.

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Re:Java 14 Feature Spotlight: Records by dman on Tuesday February 04, 2020 @01:35PM (#22239217)

That ship has sailed.

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Re:Java 14 Feature Spotlight: Records by abraxas on Tuesday February 04, 2020 @07:12PM (#22242627)

What do you mean?

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Re:Java 14 Feature Spotlight: Records by dman on Wednesday February 05, 2020 @02:25PM (#22250162)

I think there was an opening for a fast safe alternative to C++ in HPC, but I think Rust has taken that spot now. Control over allocation, alignment and placement is important in HPC and imo Java took too long to address these issues.

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