Reassure - keep your React components' performance high

Ensure your React components perform as intended as your app grows

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Ensure your React components perform as intended as your app grows

With Reassure developers will be able to write tests measuring the average rendering time of the in-app components and monitor these for each pull request in order to pro-actively notice performance issues.

Categorizing performance issues by their significance

From in-house project to Open Source

We’ve created the Reassure to originally help one of our clients, Entain, in monitoring performance regression of React components in their app. Now, thanks to their willingness to develop the React & React Native ecosystem, we decided to make it Open Source. 

What is Reassure capable of?

With Reassure developers will be able to write tests measuring the average rendering time of the in-app components and monitor these for each pull request in order to pro-actively notice performance issues.

We can help you to:

‍Write performance tests

‍Write performance tests

using familiar Testing Library syntax

Compare performance

Compare performance

between different versions of your code

Run on your favorite CI

Run on your favorite CI

as long as it provides stable results

Integrate with Github

Integrate with Github

for real-time feedback during code review

Maintain high-performance

Maintain high-performance

stats of your React components

Project Team Members

Callstack astronaut

Head of Technology overseeing Callstack's Open Source and R&D efforts. Making sure we keep on innovating in app development space. Passionate about building OSS tools for JS devs. Created React Native Testing Library. And he likes rockets!

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Michał Pierzchała

Head of Technology
Callstack astronaut

An expert with years of experience in building native iOS and Android apps. Passionate about building delightful & well-architected mobile apps. Enjoys cooperating with clients and enabling dev teams to effectively deliver high-quality software. Likes to learn and share his knowledge about all things RN: TypeScript, best practices, new architecture, testing, performance, etc. Maintainer of React Native Testing Library & Reassure OSS projects. Likes to travel and take photographs, favorably travel photos.

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Maciej Jastrzębski

Expert Software Engineer
Callstack astronaut

Experienced React developer and Data Science enthusiast. Focused strongly on self development and tackling new challenging tasks. Huge fan of functional programming and fascinated by algorithmics. In free time he loves playing with his cats and tasting delicious food. He's trying to make people's lives easier with code.

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Tomasz Krzyżowski

Software Engineer
Callstack astronaut

React-Native Senior, with 12 years of experience in Mobile development, working with Android, Flutter, RN,  iOS and Unity. Collaborator of react-native-paper OSS library. Looking forward to make readable and maintainable code. Built a Mobile app with 6-digit revenue! He likes doing sports and dancing.

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Eduardo Graciano

Software Engineer
Callstack astronaut

Full-stack developer with years of experience in building web apps with React. In love with everything around JavaScript and a big fan of serverless. Productivity geek, enjoying learning in any form. Interested in all things: React, Jamstack & serverless. Started programming to create a (yet another) social media platform.

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Adam Horodyski

Software Engineer
Callstack astronaut

Software developer with affection to React Native. Maintainer of the React Native Paper OSS library. Design systems enthusiast, who likes finding cross-platform solutions. Characterized by a precise and methodical approach to the problem. Open to exploring new technologies and development opportunities. Sport is an important part of his life.

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Łukasz Walczak

Software Engineer

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