
Denys's Optimizer
A basic optimization pack to make the game run better.
Screenshots



About this Modpack
This modpack aims to improve performance on all hardware, and generally improve the experience.
This contains mods from popular modpacks such as Simply Optimized, Fabuously Optimized, and other modpacks.
I have built this modpack with the players in mind. As I test my modpack versions on various hardware (Including office PCs.)
I will try my best to keep this updated as much as possible.
Please submit any issues to this Discord Server
All the best,
Denys.
[Although this modpack is designed to increase preformance, I do not guarantee that it will do that on some hardware. If the pack does not function as intended, please contact me.]
Available Versions
How to Set Up a Denys's Optimizer Server
Order Server
Choose at least 4 GB RAM (6 GB recommended for Denys's Optimizer). Based on player count: per 8 players.
Install Modpack in Dashboard
Open the modpack browser in the dashboard, search for "Denys's Optimizer" and click "Install". The fabric loader and Minecraft 1.21.1 are configured automatically.
Start Server & Play
Start the server – all mods are loaded automatically. Share the server IP with friends and play together!
Frequently Asked Questions
Denys's Optimizer server crashes or won't start – what to do?
Most common causes: insufficient RAM or wrong fabric loader. Check latest.log for "OutOfMemoryError" → increase RAM to at least 6 GB. For "Mixin" or "ClassNotFoundException" errors: modpack version and loader don't match. With Mado Hosting, loader and Minecraft version are auto-configured on modpack install – preventing most startup issues.
How much RAM does a Denys's Optimizer server really need?
Minimum 4 GB, recommended 6 GB for stable performance. per 8 players. Important: Minecraft modpacks need more RAM than vanilla – plan extra per additional player. With Mado Hosting, you can scale RAM up live at any time without data loss (from €8/month).
Can I add custom mods to Denys's Optimizer without conflicts?
Yes, but check compatibility: only use mods for the same loader (fabric) and same Minecraft version (1.21.1). Common issues: ID conflicts with recipe mods and incompatible coremod versions. The Mado dashboard mod browser only shows compatible mods and warns about known conflicts.
Denys's Optimizer server lagging – performance tips
1) Increase RAM to 6 GB+. 2) Reduce server view-distance to 8 (server.properties). 3) Pre-generate chunks with the "Chunky" plugin. 4) Use /spark profiler to check which mods consume the most tick time. With Mado Hosting, all servers run on NVMe SSDs with dedicated CPU cores – eliminating hardware as a bottleneck.
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Rent Denys's Optimizer Server
Start your own server with automatic modpack installation.
Supported Versions
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From €8.00/month with 6 GB RAM for the best performance.
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