what is ssbu-online-deluxe-beta fr?

SSBU Online Deluxe is a modification for Super Smash Bros. Ultimate, the Nintendo Switch fighting game, that aims to reduce input lag and improve the online multiplayer experience. It works by adjusting how the game handles its graphics pipeline and network settings, changes that can reduce the delay between pressing a button and seeing the result on screen. The main features include a real-time display of your opponent's ping (the network round-trip time, which indicates connection quality), manual controls for adjusting latency and buffering during online matches, and automatic switching between recommended settings when you enter or exit an online match. If both players have the mod installed, each can also see the other's current render and network settings. The rendering controls include options such as switching between double and triple buffering (a tradeoff between frame stability and input delay), disabling vertical sync to lower latency at the cost of possible screen tearing, and enabling dynamic resolution, which temporarily reduces visual quality during graphically intense moments to keep the frame rate stable. Recommended preset configurations for offline play, console online, and emulator online are listed in the README. Installation involves copying a folder to the root of the SD card on a modified Nintendo Switch. A Switch emulator called Eden is also supported with a specific workaround. The README is upfront that online use carries a non-zero risk of an account ban, and that the mod is still in beta with stability subject to change. The source code has not yet been published but is planned for release alongside more detailed documentation and a cleanup of the codebase.