Meta leveraged Instagram's existing monolithic architecture and quickly iterated to create a new text-first microblogging service in record time.
Meta formed a small team to devise an approach to delivering a new service that would directly compete with Twitter in just a few months, using existing Instagram backend components.
Threads's technology stack closely mirrors Instagram's, with monolithic application components, custom Django framework (Distillery), PHP integration (WWW), TAO for data storage, UDB for MySQL deployment, ZippyDB for key-value cache, and Async for serverless compute.
The team used a Server-Driven UI (SDUI) approach while working on Threads to enable quick experimentation cycles in the early stages of development.
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