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Cake day: July 24th, 2023

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  • You could save 0.64 bit per char more if you actually treated you output as a binary number (using 6 bits per char) and didn’t go through the intermediary string (implicitly using base 100 at 6.64 bits per char).
    This would also make your life easier by allowing bit manipulation to slice/move parts and reducing work for the processor because base 100 means integer divisions, and base 64 means bit shifts. If you want to go down the road of a “complicated” base use base 38 and get similar drawbacks as now, except only 5.25 bits per char.







  • Rust has monomorphisation like C++ and every function has the aliasing guarantees of restrict, a keyword rarely seen in C code bases use and C++ doesn’t even support.
    This means you can get more optimisations while writing in an intuitive style, where C/C++ requires some changes to the code.

    On the other hand rustc has some hiccups with argument passing and rvo. One could argue that that’s just the compiler while the aliasing problems are part of the language in the C/C++ case, but while there is only one rust compiler its performance is the languages performance.

    For most use cases they are about equally fast.







  • If you want to have a library that can also be a standalone executable, just put the main function in an extra file and don’t compile that file when using the library as a library.
    You could also use the preprocessor to do it similar to python but please don’t.

    Just use any build tool, and have two targets, one library and one executable:

    LIB_SOURCES = tools.c, stuff.c, more.c
    EXE_SOURCES = main.c, $LIB_SOURCES
    

    Edit: added example