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description=Is your sidebar conversation list loading slowly on initial load? Learn about my experience resolving hydration issues and improving performance through dynamic loading. Tagged with react, nextjs.;
keywords=react, nextjs, software, coding, development, engineering, inclusive, community;

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Text of the page (random words):
sidebar conversation list slow initial load hydration issue resolution dev community skip to content navigation menu search powered by algolia search log in create account dev community close add reaction like unicorn exploding head raised hands fire jump to comments save boost pick as gem more copy link copy link copied to clipboard share to x share to linkedin share to facebook share to mastodon share post via report abuse 박준희 posted on jul 15 originally published at aicoreutility com sidebar conversation list slow initial load hydration issue resolution react nextjs ever been frustrated by a sluggish sidebar conversation list when it first pops up especially for a heavy user hopping into the app for the first time that loading speed is their first impression right today i want to talk about how i tackled the initial loading performance of that very sidebar conversation list attempts and pitfalls at first i simply thought about reducing the number of conversations displayed in the sidebar so i changed the logic to show only the first 25 initially and the rest would be loaded when the show more button was clicked initial conversation list rendering logic simplified const initialconversations conversations slice 0 25 render ui using initialconversations enter fullscreen mode exit fullscreen mode even though the amount of data was clearly reduced strangely i still felt a lag during the hydration process the rendering itself seemed faster but when the user tried to interact with something there was a noticeable delay not an actual error message but the symptom i felt at the time uncaught error hydration failed because the initial ui does not match the server rendered ui or simply slow ui response enter fullscreen mode exit fullscreen mode i stared at it for a long time wondering why this was happening when i had reduced the data i was just guessing perhaps unnecessary computations were running continuously within the component or maybe it was clashing with another library after about 3 hours of struggling i finally found the cause the cause the problem was that simply reducing the amount of data loaded during the initial load wasn t enough what i overlooked was that even with the reduced data i was trying to calculate and prepare all the information contained within that data e g last message content read status etc at the initial rendering point in other words while the data itself was less the computational cost of processing that data was still high this caused a bottleneck during hydration as it tried to perform all these computations at once the solution ultimately the solution was much simpler for the initial load i changed it to load only the absolute minimum information and dynamically load the rest of the detailed information when the user clicks on that conversation or scrolls down improved initial conversation list rendering logic simplified const initialconversations conversations slice 0 25 map conv id conv id name conv name detailed info like last message content read status etc are not loaded here load detailed info when the user clicks a specific conversation or scrolls function loadconversationdetails conversationid load detailed info via api call etc enter fullscreen mode exit fullscreen mode by doing this only the essential id and name were loaded into memory during the initial render making the hydration process significantly lighter the results the initial entry experience for heavy users of the application has noticeably improved page loading speed became perceptibly faster and ui responsiveness significantly increased previously there were flickering or freezing issues during loading but these have almost disappeared summary how to avoid the same pitfall for components with a lot of data like sidebars or lists design them to load only the absolute minimum information during initial loading consider a strategy where detailed information like last message content and read status is dynamically loaded based on user interaction clicks scrolls etc remember that beyond just the amount of data the computational cost of processing each data item also impacts initial rendering performance if you encounter hydration errors or reduced ui responsiveness check not only the data volume but also the computational logic within the component this is part of riel a full ai product i m building solo in public failures and all read more build logs see the product top comments 0 subscribe personal trusted user create template templates let you quickly answer faqs or store snippets for re use submit preview dismiss code of conduct report abuse are you sure you want to hide this comment it will become hidden in your post but will still be visible via the comment s permalink hide child comments as well confirm for further actions you may consider blocking this person and or reporting abuse 박준희 follow joined jun 2 2026 more from 박준희 how to hide unnecessary ui tabs in the frontend frontend ui react solving slow chatbot loading with lazy loading and tree shaking lazyloading react improving user experience by default collapsing the insights panel in the admin page analytics tab react uiux dev community a space to discuss and keep up software development and manage your software career home dev challenges dev videos dev education tracks dev help advertise on dev organization accounts dev showcase about contact free postgres database dev shop mlh code of conduct privacy policy terms of use built on forem the open source software that powers dev and other inclusive communities made with love and ruby on rails dev community 2016 2026 we re a place where coders share stay up to date and grow their careers log in create account