The Twitter Engineering Blog

Information from Twitter's engineering team about our technology, tools and events.

Building and Serving Conversations on Twitter

Some of the most memorable interactions on Twitter occur because of the public conversations that take place on our service. Lately, we’ve been hearing feedback about a complication with these conversations – sometimes, when you reply to a Tweet, you aren’t able to see your reply in the conversation. Due to a longstanding technical capacity limitation, when there is an overwhelming volume of replies to a Tweet, our platform is unable to show all of these replies on the Tweet’s page.

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Optimizing Twitter Heron

In this blog we describe how we profiled Heron to identify performance limiting components, we highlight the optimizations, and we show how these optimizations improved throughput by 400-500% and reduced latency by 50-60%.

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Introducing Twitter Image Pipeline iOS framework for open source

Today, we’re excited to open source our Twitter Image Pipeline iOS framework, or TIP for short.

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The Infrastructure Behind Twitter: Scale

In the last infrastructure blog post we focused on some of the key efficiency and optimization efforts that we’ve made over the years and in this one, we’ll cover the challenges we’ve had to overcome to scale some of our key services and network.

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Moving Top Tweet Search Results from Reverse Chronological Order to Relevance Order

How Twitter search broke out of its reverse chronological order constraints to bring people more relevant results.

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Simplify Service Dependencies with Nodes

A history of how we handle service dependency graphs in search backend, and introducing a new library to make the implementation of asynchronous services in Java easier.

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Omnisearch Index Formats

In this post, we discuss how we have evolved our search technology to accommodate diverse document types, the surprising performance impact of these changes, and how we are using this improved technology to power Twitter’s latest product efforts.

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#WhyIAttendGHC 2016

An overview of our trip to GHC this year

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How Twitter deploys its widgets JavaScript

The technical details of how Twitter safely deploys widgets.js to keep things simple for publishers, catch mistakes early, and avoid negative customer impact.

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Reinforcement Learning for Torch: Introducing torch-twrl

We are exploring RL as a learning paradigm, and to that end, Twitter Cortex built a framework for RL development. Today, Twitter is open sourcing torch-twrl to the world.

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