Talking about NodeJS
summary
Advice says that performance comes from consistent types and object shapes, not magic. Claim: inject properties in constructors so V8 creates stable hidden classes and favors the inline caching paths in d8, avoiding deoptimizations. Note that prototypes have a creation stage and a use stage and the way prototypes are built changes runtime performance. Also reports on coordination pain when assembling many subsystems to ship a large system, and how team organization, not just code, determined success.
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