Migration Experience of a Social Network from PHP/MySQL to NodeJS/Redis/Lua
summary
Describes migrating the LiveStreet social network from a PHP/MySQL stack to Node.js with Redis and Lua, targeting performance bottlenecks. The migration removes repeated PHP–MySQL–Memcached marshalling, per-request framework initialization, complex cache/invalidation logic, heavy normalized schemas with many JOINs, filesystem and DB file accesses, and legacy languages that hinder JIT optimization.
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