Certain skills (like Double Strafe or Acid Bomb ) have no built-in cooldown but are limited by their animation time. Removing these frames allows the player to "spam" the skill as fast as their connection and Attack Speed (ASPD) allow.

Players use these modified files to gain a competitive edge, particularly in high-stakes PvP: Help us enforce no delay! - Foundry Archive

In Ragnarok Online, a GRF is a compressed archive containing all game resources, including sprites, sounds, and map files. "No delay" is achieved by targeting specific files within this archive:

Understanding "No Delay" GRF in Ragnarok Online : Mechanics, Impact, and Risks

While these modifications are common in competitive environments like , they often reside in a legal and ethical gray area, frequently being classified as hacks or cheats on official and many private servers. How No Delay GRFs Work

A is a modified Gravity Resource File (GRF) for Ragnarok Online that alters client-side assets to remove or shorten skill animations , effectively allowing players to spam skills faster than the standard visual frames would normally permit. By editing .ACT (animation) files, players can bypass the "hard animation" lock that prevents a new action from starting until the previous one’s visual sequence is complete.