# Making TimesSquare fast on iOS

DevFeed: [Making TimesSquare fast on iOS](<https://devfeed.tech/articles/making-timessquare-fast-on-ios-15758.md>)

Original publisher: [Read original article](<https://developer.squareup.com/blog/making-timessquare-fast-on-ios>)

Author: Square Engineering

Published: 2013-03-20T16:02:00Z

Content type: tutorial

Language: en

Sources: [Square Corner Blog RSS Feed](<https://devfeed.tech/sources/square-corner-blog-rss-feed.md>)

Topics: [iOS](<https://devfeed.tech/topics/ios.md>), [Library](<https://devfeed.tech/topics/library.md>), [Objective-C](<https://devfeed.tech/topics/objective-c.md>), [Xcode](<https://devfeed.tech/topics/xcode.md>), [simulator](<https://devfeed.tech/topics/simulator.md>), [cpu](<https://devfeed.tech/topics/cpu.md>), [Open Source](<https://devfeed.tech/topics/open-source.md>)

Tags: [cpu](<https://devfeed.tech/tags/cpu.md>), [engineering](<https://devfeed.tech/tags/engineering.md>), [ios](<https://devfeed.tech/tags/ios.md>), [objective-c](<https://devfeed.tech/tags/objective-c.md>), [open-source](<https://devfeed.tech/tags/open-source.md>), [profiling](<https://devfeed.tech/tags/profiling.md>), [simulator](<https://devfeed.tech/tags/simulator.md>), [xcode](<https://devfeed.tech/tags/xcode.md>)

## AI overview

This tutorial explains how the TimesSquare calendar library became slow when integrated into Square Wallet on iOS. It uses Xcode Instruments and a simulator test app to profile scrolling performance and identify methods consuming substantial CPU time.

## Source excerpt

Showing a calendar is easy. Showing it quickly isn't quite so simple.