I miss thinking hard

Re:I miss thinking hard by skydhash on Wednesday February 04, 2026 @10:36AM (#46887121)

> Is there a spec that says if you use a particular set of libraries you’d get less than 10 millisecond response?

There can be. But you’d have to map the libraries to opcodes and then count the cycles. That’s what people do when they care about that particular optimization. They measure and make guaranties.

[ Parent | on HN ]

Re:I miss thinking hard by raw_anon_1111 on Wednesday February 04, 2026 @01:52PM (#46889977)

That’s not realistic with any processor that does branch prediction, cache hits vs cache misses etc

[ Parent | on HN ]

Re:I miss thinking hard by skydhash on Wednesday February 04, 2026 @03:42PM (#46891417)

You can easily compute the worst cases. All the details are in the specs of the processor.

[ Parent | on HN ]

Re:I miss thinking hard by raw_anon_1111 on Wednesday February 04, 2026 @04:16PM (#46891905)

Assuming also that you are not running on top of an operating system, running in a VM with “noisy neighbors”…

I haven’t counted cycles since programming assembly on a 65C02 where you cooks save a clock cycle by accessing memory in the first page of memory - two opcodes to do LDA $02 instead of LDA $0201

[ Parent | on HN ]

Re:I miss thinking hard by skydhash on Wednesday February 04, 2026 @05:10PM (#46892555)

Then assumes the opposite. Build an RTOS and don’t virtualize your software on top of it.

[ Parent | on HN ]