PrivateProfileRedirector F4 - Faster game start (INI file cacher)
🟡 Updated this year⚠️ Install Order · 2 steps
Install in this order, then this mod last — most mods fail to load without their framework and dependencies in place.
Preview

🔍 Analysis
- 👍 1.9% endorsement rate — high engagement, a strong quality signal
- 🏆 #41 of 103 Bug Fixes mods in this game by downloads
📋 About This Mod
Problem
The issue this plugin tries to solve comes from the fact that the game uses an old, deprecated and extremely inefficient function to load values from INI files. The function in question is GetPrivateProfileString (and the rest of PrivateProfile function family to lesser extent), a relic of 16-bit operating system. But do you know what is worse than using such a function? Using it hundreds of thousands of times. Apparently the game uses that function for every game setting individually, which means that the same INI file is opened and closed hundreds of times. What really makes this terrible is the fact that for each enabled plugin the game will attempt to read all the same settings from a hypothetical INI file that that plugin might or might not be loading. So you end up with an insane amount of incredibly inefficient calls for each enabled mod plugin. As a solution this mod will hook the functions involved and load the target INI files in memory so that each following call to the same INI file will be much faster as it will read directly from memory and will not require opening the file from scratch again.
The amount of seconds that this mod will reduce your start time by depends on the amount of enabled plugins you have, as well as other things using INI files such as ENB (though ENB comes with its own loading issues that this mod can't fix). It will be basically imperceptible when used on the vanilla game and will go up from there, shaving off 6 seconds for 50 or so plugins, up to 20+ seconds for 250+ plugins.
Solution
When the game, ENB or something else calls GetPrivateProfileString for the first time this plugin will load requested file in memory and return required data. Next time, no file will be loaded and data will be fetched from memory as well. Same thing happens when process tries to write a value to file. Instead of opening file again, parse and save to disk the plugin will write data it to in-memory file and then saves to disk (if allowed). Also all files is saved on game close, if game won't crash in process.
Covered WinAPI functions
-
[]GetPrivateProfileStringA
[
]GetPrivateProfileStringW[]WritePrivateProfileStringA
[]WritePrivateProfileStringW
[]GetPrivateProfileIntA
[]GetPrivateProfileIntW
[]GetPrivateProfileSectionNamesA
[]GetPrivateProfileSectionNamesW
[]GetPrivateProfileSectionA
[]GetPrivateProfileSectionW
Integrations
Script Extender (XSE)
The mod supports XSE and, if used with the matching XSE build, will use XSE to bind to some of the game's events (such as game saving) and call this mod functions from the game's console.
This integration cur
PrivateProfileRedirector F4 caches INI file reads in memory to accelerate game startup, eliminating repeated file parsing. With nearly 9,000 endorsements and over 470,000 downloads, it's a widely trusted performance fix for Fallout 4 players. Last updated June 2026, it remains actively maintained.
✨ Key Features
📊 Pros & Cons
✅ Pros
- Huge community trust: 8,893 endorsements and nearly half a million downloads
- Directly tackles a common annoyance—slow game start—with a simple, effective approach
- Actively maintained, last updated June 2026, so it's likely compatible with current game versions
⚠️ Cons
- Requires a mod manager for proper installation, which might be a hurdle for manual installers
- Potential conflicts with other INI-modifying mods are not documented, so you'll need to test yourself
For Fallout 4 players who are tired of long loading times and want a quick performance boost without altering gameplay. Perfect for modders who frequently tweak INI files and want faster startup. Skip if you're on an SSD with minimal load times—you might not notice the difference.
💡 Beginner Tips
- Use a mod manager like Vortex or Mod Organizer 2 to install this—it's the safest way to avoid file conflicts.
- After installing, launch the game once to let the cache build, then restart to see the full startup speed improvement.
- If you use other mods that edit INI files, install this one last to ensure it caches the final values.
📊 Mod Details
- Game
- Fallout 4 Mods
- Author
- Karandra
- Version
- 0.6.3.1
- Downloads
- 471,849
- Endorsements
- 8,893
- Category
- Bug Fixes
- Created
- 8/9/2018
- Updated
- 6/10/2026
🔧 How to Install Fallout 4 Mods
Download from Nexus.
📖 Full step-by-step install guide for Fallout 4 →
Visit the official mod page for specific installation instructions for this mod.
🎮 Need cheat codes or console commands? Check ur gaming wiki for Fallout 4 commands, item IDs, and more.
Keep browsing — more Fallout 4 mods await