Por que entender stack, heap e memória ainda importa para quem programa em JavaScript

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Um artigo do DEV Community compara alocação de memória em C com o funcionamento em JavaScript, onde o runtime cuida de boa parte desse trabalho. O texto explica que alocar, usar e desalocar memória são etapas distintas, e que liberar espaço não significa necessariamente devolvê-lo ao sistema operacional. Também separa escopo, que define onde um nome é acessível, de tempo de vida, que define quanto tempo um objeto existe. Segundo o autor, esses conceitos ajudam a explicar casos como objetos que mudam juntos ou dados que permanecem na aplicação sem necessidade. O conteúdo faz parte de uma série sobre tecnologias usadas diariamente pelos desenvolvedores.

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