Interprocedural optimization in GCC https://kristerw.blogspot.co.uk/2017/05/interprocedural-optimization-in-gcc.html (overview of some GCC optimisation techniques, along with usage examples)
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Designing a GUI library for Rust, and an excellent overview of the many different approaches taken in GUI frameworks:
Excellent overview of WebAssembly, its asm.js predecessor, and how the Rust ecosystem fits in: https://youtu.be/CMB6AlE1QuI
Gerbil Scheme has a great looking website with a friendly overview: