BigBinary

Recently, we had a crash in our NeetoCRMapplication.As we can see in the screenshot, it looks like the error happened inneeto-widget-replay.js file.At Neeto we have built an internal tool called NeetoReplaywhich captures users' activities in the browser.

Recently, some Neeto customers reported experiencing a verylong page load time. For some of them, the page didn't even load. We found thatthe issue is related to CDN caching.Neeto uses React.js for the front-end code, and the asset files are hosted atClou

Playwright traces are like flight recorders for your tests - they capture everyaction, network request, DOM snapshot, and console log during test execution.When a test fails, especially in CI environments, traces become the mostpowerful debugging tool, pr

This blog started with an explanation of how DNS works inNeeto. However we covered a lot of ground about how DNSactually works.The Basics of DNS RecordsA Domain Name System (DNS) is a hierarchical and decentralized naming system forcomputers and servers c

A few weeks ago, after upgrading NeetoCal fromRails 7.1.5.2 to Rails 7.2.1.1, we started seeing mysterious crashes inproduction with the error message SystemStackError: stack level too deep.Identifying the problemThe crash happened inside Slots::SyncAllCa

In Rails8, we can now mark ActiveRecord associations as deprecated. This makesit easy to phase out old associations from our codebase, while still keepingthem around to safely remove their usage. Whenever a deprecated association isused, whether by callin

Active Job Continuations was recently merged into Rails. We recommend that you gothrough the description in thepull request since they are sowell written.If you prefer watching a video to learn about Active Job Continuations, then wemade a video for you.

This is Part 6 of our blog series onscaling Rails applications.Queueing SystemsIn web applications, not every task needs to be processed immediately. When youupload a large video file, send a bulk email campaign, or generate a complexreport, these time-co

This is Part 5 of our blog series onscaling Rails applications.Database Connection PoolingWhen a Rails application needs to interact with a database, it establishes aconnection, which is a dedicated communication channel between the applicationand the dat

This is Part 4 of our blog series onscaling Rails applications.Inpart 1we saw how to find ideal number of processes for our Rails application.Inpart 3,we learned about Amdahl's law, which helps us find the ideal number of threadstheoretically.In this blog