Moving beyond fork() + exec()
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Deep technical exploration of alternatives to fork()+exec(), highly relevant to systems programming and infrastructure.
Li Chen's proposed 'spawn templates' for Linux aim to accelerate repeated fork()+exec() patterns by caching executable metadata in a file descriptor, reducing setup costs for programs like Git that launch the same binary many times. The patch introduces spawn_template_create() and spawn_template_spawn() syscalls, where the template caches file data while per-invocation arguments (argv, envp, fd actions) are passed separately. Benchmarks show significant speedups, though the proposal was rejected in current form, pointing toward future kernel process-creation primitives.