Slack High Memory Usage and Unreliable Notifications Reduce Reliability
Slack consumes excessive system memory and notification delivery is inconsistent, causing users to miss messages or experience sluggish performance. The Electron-based desktop client is a known resource bottleneck that Slack has not fully resolved. Teams dependent on Slack for real-time communication cannot tolerate missed notifications from a tool positioned as their primary channel.
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Similar Problems
surfaced semanticallySlack Desktop App Uses Heavy RAM and Makes Old Files Hard to Find
A user reports Slack desktop slowing their PC, distracting notifications, and slow retrieval of old files and links. These are common complaints about chat tools at scale.
Slack Mobile App Drains Battery and Causes Missed Critical Messages
The Slack mobile app is heavy on battery consumption and notification unreliability causes users to miss important messages. These are compounding problems — high drain discourages background use while poor notification logic reduces message-receive reliability. Affects all mobile-first or hybrid workers.
Slack Desktop App Consumes Excessive RAM and CPU on Laptops
Slack's Electron-based desktop application is notorious for high memory and CPU consumption, degrading performance on laptops especially when multiple workspaces are open. This forces users to close Slack to reclaim system resources or accept reduced responsiveness across other applications. The issue has persisted for years and is a known architectural constraint of the Electron framework.
Slack notifications fail to fire the majority of the time
A user reports that Slack notifications work correctly only about one in ten times, making the app unreliable for real-time communication. This core reliability failure undermines the primary purpose of a team messaging tool.
Slack Slow to Load With Delayed Notifications
A user reports that Slack is slow to load and that notifications arrive late, disrupting timely communication. The complaint is a single performance report against an existing vendor product.
Problem descriptions, scores, analysis, and solution blueprints may be updated as new community data becomes available.