The Twitter Engineering Blog

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

Posts from Engineering: Twitter data

Implications of use of multiple controls in an A/B test

Using a second control can be a tempting method of validating experiment results. We explore the statistics underlying usage of a second control, and conclude that this approach is strictly inferior to using a single large control.


Visually explore funnels of user activities

We describe our experimental visual analytics approach for funnel analysis, which helps us explore how users interact with the user interfaces and gain new insights for improving user engagement with Twitter.


Detecting and avoiding bucket imbalance in A/B tests

Some simple techniques to detect potentially biased implementations of A/B tests.


Using Twitter to measure earthquake impact in almost real time

With the help of researchers at Stanford, we used geo-tagged Tweets from around the world to measure earthquake impact in almost real time.