Viewing profile — psykotic

> Most self taughts lack broader concepts, abstractions and especially algorithms. As a self-taught who later went to university for pure mathematics (which I got interested in thr…

LTO for LLVM/clang and gcc is implemented by getting the compiler to emit internal compiler IR code rather than machine code to the object files. The linker's job is to call into t…

Let's go to primary sources: https://developer.arm.com/documentation/ddi0487/latest The author is right. ARMv8 supports relaxed memory ordering but its memory model does not suppor…

> If you want to refactor, it's up to you to delete the types. The fact that f(g(x)) and { let y = g(x); f(y) } are equally robust to changes in g(x)'s type is an advantage of type…

> It's possible to build a hash on tolerant doubles by making two hashes per lookup, and even complex numbers with four per lookup, but no one's figured out how to deal with entrie…

Their financials are accessible now that they're a publicly traded company. https://investors.unity.com/news/news-details/2022/Unity-Ann...

Not sure what time scale you had in mind with "many many years" but the commercial third-party extension Visual Assist has been the only serious option for robust and scalable C++ …

I've only profiled fd on Windows but one thing that stood out was that it performed 2 stat syscalls per file via NtQueryInformationFile (that number should be 0 per file on Windows…

A space-aware syntax can allow optional spacing around operators but make it an error if it does not respect the precedence hierarchy or is deemed inconsistent by other rules.

> Even full-fledged database systems don't typically implement B+ tree indexes with deletion+rebalancing support (the usual technique is marking nodes deleted and cleaning them up …

I think you need 2 log2(n) - 1 butterfly stages to realize an arbitrary permutation.

Just wanted to cosign that this is absolutely a real-world concern. For that reason I always try to make huge reservations as early in the process lifecycle as possible [1] and the…

A fast binary search intended for B-tree key array searches does not have branches at all [1]. An B-tree interior node's key array is usually sized to fit in one cache line, so the…

"Invariant RDTSC" has been the norm for a long time now (identifiable by a CPUID feature bit) and it doesn't vary with power states or dynamic frequency. Which means it's just a li…

In a similar vein, all non-tiled GPUs do some form of lossless framebuffer compression purely as a bandwidth optimization (it doesn't save on DRAM footprint because that would mess…

As a counterexample to your claim about "every other ISA", ARM64 doesn't have an x86-style popcount instruction. Its CNT instruction operates on vectors, not words, and gives you t…

It's not widely known but PCRE (which I assume is still the most widely used regex library) supports partial matching which you can use to interoperate with any piecewise linear st…

I've never seen a laptop with a removable battery where you couldn't remove the battery and power it directly.