ImmediatelyFast

Modrinth

Speed up immediate mode rendering in Minecraft

141M downloads11.9K followersUpdated 18d ago

1.6.15+1.21.1-fabric · MC 1.21.1 · Fabric, Quilt

Files

1.6.15+1.21.1-fabric
release
ImmediatelyFast 1.6.15
1.21.11.21fabricquilt
2026-10-13 · 262K downloads
ImmediatelyFast-Fabric-1.6.15+1.21.1.jar · 334 KB
1.6.15+1.21.1-forge
release
ImmediatelyFast 1.6.15
1.21.11.21forge
2026-10-13 · 13.9K downloads
ImmediatelyFast-Forge-1.6.15+1.21.1.jar · 533 KB
1.6.15+1.21.1-neoforge
release
ImmediatelyFast 1.6.15
1.21.11.21neoforge
2026-10-13 · 288.3K downloads
ImmediatelyFast-NeoForge-1.6.15+1.21.1.jar · 360 KB
1.17.1+26.3-neoforge
release
ImmediatelyFast 1.17.1
26.3neoforge
2026-09-17 · 148.7K downloads
ImmediatelyFast-NeoForge-1.17.1+26.3.jar · 107 KB
1.17.1+26.3-fabric
release
ImmediatelyFast 1.17.1
26.3fabricquilt
2026-09-17 · 3.4M downloads
ImmediatelyFast-Fabric-1.17.1+26.3.jar · 97 KB
1.17.0+26.3-fabric
release
ImmediatelyFast 1.17.0
26.3fabricquilt
2026-09-16 · 111.9K downloads
ImmediatelyFast-Fabric-1.17.0+26.3.jar · 97 KB
1.17.0+26.3-neoforge
release
ImmediatelyFast 1.17.0
26.3neoforge
2026-09-16 · 656 downloads
ImmediatelyFast-NeoForge-1.17.0+26.3.jar · 107 KB
1.16.5+26.2-fabric
release
ImmediatelyFast 1.16.5
26.2fabricquilt
2026-09-16 · 1.4M downloads
ImmediatelyFast-Fabric-1.16.5+26.2.jar · 98 KB
1.16.5+26.2-neoforge
release
ImmediatelyFast 1.16.5
26.2neoforge
2026-09-16 · 25.4K downloads
ImmediatelyFast-NeoForge-1.16.5+26.2.jar · 108 KB
1.6.14+1.21.1-forge
release
ImmediatelyFast 1.6.14
1.21.11.21forge
2026-09-13 · 15K downloads
ImmediatelyFast-Forge-1.6.14+1.21.1.jar · 531 KB
1.6.14+1.21.1-fabric
release
ImmediatelyFast 1.6.14
1.21.11.21fabricquilt
2026-09-13 · 290.1K downloads
ImmediatelyFast-Fabric-1.6.14+1.21.1.jar · 332 KB
1.6.14+1.21.1-neoforge
release
ImmediatelyFast 1.6.14
1.21.11.21neoforge
2026-09-13 · 372K downloads
ImmediatelyFast-NeoForge-1.6.14+1.21.1.jar · 357 KB
1.16.4+26.2-fabric
release
ImmediatelyFast 1.16.4
26.2fabricquilt
2026-08-27 · 1.1M downloads
ImmediatelyFast-Fabric-1.16.4+26.2.jar · 96 KB
1.16.4+26.2-neoforge
release
ImmediatelyFast 1.16.4
26.2neoforge
2026-08-27 · 24.7K downloads
ImmediatelyFast-NeoForge-1.16.4+26.2.jar · 104 KB
1.6.13+1.21.1-forge
release
ImmediatelyFast 1.6.13
1.21.11.21forge
2026-08-27 · 6K downloads
ImmediatelyFast-Forge-1.6.13+1.21.1.jar · 528 KB
1.6.13+1.21.1-neoforge
release
ImmediatelyFast 1.6.13
1.21.11.21neoforge
2026-08-27 · 310.2K downloads
ImmediatelyFast-NeoForge-1.6.13+1.21.1.jar · 354 KB
1.6.13+1.21.1-fabric
release
ImmediatelyFast 1.6.13
1.21.11.21fabricquilt
2026-08-27 · 364.6K downloads
ImmediatelyFast-Fabric-1.6.13+1.21.1.jar · 330 KB
1.16.3+26.2-neoforge
release
ImmediatelyFast 1.16.3
26.2neoforge
2026-08-16 · 16.9K downloads
ImmediatelyFast-NeoForge-1.16.3+26.2.jar · 98 KB
1.16.3+26.2-fabric
release
ImmediatelyFast 1.16.3
26.2fabricquilt
2026-08-16 · 728.3K downloads
ImmediatelyFast-Fabric-1.16.3+26.2.jar · 90 KB
1.6.12+1.21.1-fabric
release
ImmediatelyFast 1.6.12
1.21.11.21fabricquilt
2026-08-16 · 115.4K downloads
ImmediatelyFast-Fabric-1.6.12+1.21.1.jar · 329 KB
1.6.12+1.21.1-forge
release
ImmediatelyFast 1.6.12
1.21.11.21forge
2026-08-16 · 4.3K downloads
ImmediatelyFast-Forge-1.6.12+1.21.1.jar · 528 KB
1.6.12+1.21.1-neoforge
release
ImmediatelyFast 1.6.12
1.21.11.21neoforge
2026-08-16 · 211.1K downloads
ImmediatelyFast-NeoForge-1.6.12+1.21.1.jar · 354 KB
1.16.2+26.2-neoforge
release
ImmediatelyFast 1.16.2
26.2neoforge
2026-07-11 · 37.9K downloads
ImmediatelyFast-NeoForge-1.16.2+26.2.jar · 97 KB
1.16.2+26.2-fabric
release
ImmediatelyFast 1.16.2
26.2fabricquilt
2026-07-11 · 2.6M downloads
ImmediatelyFast-Fabric-1.16.2+26.2.jar · 89 KB
1.15.3+26.1-fabric
release
ImmediatelyFast 1.15.3
26.1.226.1.126.1fabricquilt
2026-06-30 · 1.7M downloads
ImmediatelyFast-Fabric-1.15.3+26.1.jar · 303 KB
1.15.3+26.1-neoforge
release
ImmediatelyFast 1.15.3
26.1.226.1.126.1neoforge
2026-06-30 · 49.6K downloads
ImmediatelyFast-NeoForge-1.15.3+26.1.jar · 305 KB
1.14.3+1.21.11-neoforge
release
ImmediatelyFast 1.14.3
1.21.11neoforge
2026-06-30 · 59.2K downloads
ImmediatelyFast-NeoForge-1.14.3+1.21.11.jar · 298 KB
1.14.3+1.21.11-fabric
release
ImmediatelyFast 1.14.3
1.21.11fabricquilt
2026-06-30 · 3.3M downloads
ImmediatelyFast-Fabric-1.14.3+1.21.11.jar · 296 KB
1.13.6+1.21.10-neoforge
release
ImmediatelyFast 1.13.6
1.21.101.21.9neoforge
2026-06-30 · 6.9K downloads
ImmediatelyFast-NeoForge-1.13.6+1.21.10.jar · 302 KB
1.13.6+1.21.10-fabric
release
ImmediatelyFast 1.13.6
1.21.101.21.9fabricquilt
2026-06-30 · 193.7K downloads
ImmediatelyFast-Fabric-1.13.6+1.21.10.jar · 297 KB
1.12.6+1.21.8-fabric
release
ImmediatelyFast 1.12.6
1.21.8fabricquilt
2026-06-30 · 144.5K downloads
ImmediatelyFast-Fabric-1.12.6+1.21.8.jar · 294 KB
1.12.6+1.21.8-neoforge
release
ImmediatelyFast 1.12.6
1.21.8neoforge
2026-06-30 · 6.4K downloads
ImmediatelyFast-NeoForge-1.12.6+1.21.8.jar · 298 KB
1.8.7+1.21.4-forge
release
ImmediatelyFast 1.8.7
1.21.4forge
2026-06-30 · 7.1K downloads
ImmediatelyFast-Forge-1.8.7+1.21.4.jar · 523 KB
1.8.7+1.21.4-neoforge
release
ImmediatelyFast 1.8.7
1.21.4neoforge
2026-06-30 · 8.5K downloads
ImmediatelyFast-NeoForge-1.8.7+1.21.4.jar · 330 KB
1.8.7+1.21.4-fabric
release
ImmediatelyFast 1.8.7
1.21.4fabricquilt
2026-06-30 · 385.6K downloads
ImmediatelyFast-Fabric-1.8.7+1.21.4.jar · 325 KB
1.6.11+1.21.1-fabric
release
ImmediatelyFast 1.6.11
1.21.11.21fabricquilt
2026-06-30 · 1.9M downloads
ImmediatelyFast-Fabric-1.6.11+1.21.1.jar · 329 KB
1.6.11+1.21.1-neoforge
release
ImmediatelyFast 1.6.11
1.21.11.21neoforge
2026-06-30 · 644.5K downloads
ImmediatelyFast-NeoForge-1.6.11+1.21.1.jar · 353 KB
1.6.11+1.21.1-forge
release
ImmediatelyFast 1.6.11
1.21.11.21forge
2026-06-30 · 16.4K downloads
ImmediatelyFast-Forge-1.6.11+1.21.1.jar · 528 KB
1.5.5+1.20.4-neoforge
release
ImmediatelyFast 1.5.5
1.20.41.20.31.20.21.20.1+1neoforge
2026-06-30 · 56.6K downloads
ImmediatelyFast-NeoForge-1.5.5+1.20.4.jar · 363 KB
1.5.5+1.20.4-forge
release
ImmediatelyFast 1.5.5
1.20.41.20.31.20.21.20.1+1forge
2026-06-30 · 3M downloads
ImmediatelyFast-Forge-1.5.5+1.20.4.jar · 520 KB
1.5.5+1.20.4-fabric
release
ImmediatelyFast 1.5.5
1.20.41.20.31.20.21.20.1+1fabricquilt
2026-06-30 · 922.6K downloads
ImmediatelyFast-Fabric-1.5.5+1.20.4.jar · 341 KB
1.16.1+26.2-fabric
release
ImmediatelyFast 1.16.1
26.2fabricquilt
2026-06-27 · 953.8K downloads
ImmediatelyFast-Fabric-1.16.1+26.2.jar · 89 KB
1.16.1+26.2-neoforge
release
ImmediatelyFast 1.16.1
26.2neoforge
2026-06-27 · 8.7K downloads
ImmediatelyFast-NeoForge-1.16.1+26.2.jar · 96 KB
1.16.0+26.2-neoforge
release
ImmediatelyFast 1.16.0
26.2neoforge
2026-06-18 · 30.2K downloads
ImmediatelyFast-NeoForge-1.16.0+26.2.jar · 292 KB
1.16.0+26.2-fabric
release
ImmediatelyFast 1.16.0
26.2fabricquilt
2026-06-18 · 643.2K downloads
ImmediatelyFast-Fabric-1.16.0+26.2.jar · 290 KB
1.15.2+26.1.2-neoforge
release
ImmediatelyFast 1.15.2
26.1.226.1.126.1neoforge
2026-04-09 · 96.8K downloads
ImmediatelyFast-NeoForge-1.15.2+26.1.2.jar · 319 KB
1.15.2+26.1.2-fabric
release
ImmediatelyFast 1.15.2
26.1.226.1.126.1fabricquilt
2026-04-09 · 3.9M downloads
ImmediatelyFast-Fabric-1.15.2+26.1.2.jar · 298 KB
1.15.1+26.1.1-fabric
release
ImmediatelyFast 1.15.1
26.1.126.1fabricquilt
2026-04-01 · 442.9K downloads
ImmediatelyFast-Fabric-1.15.1+26.1.1.jar · 298 KB
1.15.1+26.1.1-neoforge
release
ImmediatelyFast 1.15.1
26.1.126.1neoforge
2026-04-01 · 4.9K downloads
ImmediatelyFast-NeoForge-1.15.1+26.1.1.jar · 319 KB
1.15.0+26.1-neoforge
release
ImmediatelyFast 1.15.0
26.1neoforge
2026-03-27 · 1.9K downloads
ImmediatelyFast-NeoForge-1.15.0+26.1.jar · 319 KB
1.15.0+26.1-fabric
release
ImmediatelyFast 1.15.0
26.1fabricquilt
2026-03-27 · 303.2K downloads
ImmediatelyFast-Fabric-1.15.0+26.1.jar · 298 KB
1.14.2+1.21.11-neoforge
release
ImmediatelyFast 1.14.2
1.21.11neoforge
2026-01-27 · 103K downloads
ImmediatelyFast-NeoForge-1.14.2+1.21.11.jar · 325 KB
1.14.2+1.21.11-fabric
release
ImmediatelyFast 1.14.2
1.21.11fabricquilt
2026-01-27 · 8.3M downloads
ImmediatelyFast-Fabric-1.14.2+1.21.11.jar · 303 KB
1.13.5+1.21.10-neoforge
release
ImmediatelyFast 1.13.5
1.21.101.21.9neoforge
2026-01-27 · 11.2K downloads
ImmediatelyFast-NeoForge-1.13.5+1.21.10.jar · 326 KB
1.13.5+1.21.10-fabric
release
ImmediatelyFast 1.13.5
1.21.101.21.9fabricquilt
2026-01-27 · 920.5K downloads
ImmediatelyFast-Fabric-1.13.5+1.21.10.jar · 303 KB
1.12.5+1.21.8-neoforge
release
ImmediatelyFast 1.12.5
1.21.8neoforge
2026-01-27 · 11.2K downloads
ImmediatelyFast-NeoForge-1.12.5+1.21.8.jar · 323 KB
1.12.5+1.21.8-fabric
release
ImmediatelyFast 1.12.5
1.21.8fabricquilt
2026-01-27 · 358.6K downloads
ImmediatelyFast-Fabric-1.12.5+1.21.8.jar · 300 KB
1.8.6+1.21.4-neoforge
release
ImmediatelyFast 1.8.6
1.21.4neoforge
2026-01-27 · 12.6K downloads
ImmediatelyFast-NeoForge-1.8.6+1.21.4.jar · 355 KB
1.8.6+1.21.4-forge
release
ImmediatelyFast 1.8.6
1.21.4forge
2026-01-27 · 7.6K downloads
ImmediatelyFast-Forge-1.8.6+1.21.4.jar · 530 KB
1.8.6+1.21.4-fabric
release
ImmediatelyFast 1.8.6
1.21.4fabricquilt
2026-01-27 · 650.8K downloads
ImmediatelyFast-Fabric-1.8.6+1.21.4.jar · 331 KB
1.6.10+1.21.1-neoforge
release
ImmediatelyFast 1.6.10
1.21.11.21neoforge
2026-01-27 · 2.1M downloads
ImmediatelyFast-NeoForge-1.6.10+1.21.1.jar · 360 KB
1.6.10+1.21.1-forge
release
ImmediatelyFast 1.6.10
1.21.11.21forge
2026-01-27 · 40.7K downloads
ImmediatelyFast-Forge-1.6.10+1.21.1.jar · 534 KB
1.6.10+1.21.1-fabric
release
ImmediatelyFast 1.6.10
1.21.11.21fabricquilt
2026-01-27 · 3.7M downloads
ImmediatelyFast-Fabric-1.6.10+1.21.1.jar · 335 KB
1.5.4+1.20.4-forge
release
ImmediatelyFast 1.5.4
1.20.41.20.31.20.21.20.1+1forge
2026-01-27 · 3.8M downloads
ImmediatelyFast-Forge-1.5.4+1.20.4.jar · 526 KB
1.5.4+1.20.4-fabric
release
ImmediatelyFast 1.5.4
1.20.41.20.31.20.21.20.1+1fabricquilt
2026-01-27 · 1.8M downloads
ImmediatelyFast-Fabric-1.5.4+1.20.4.jar · 347 KB
1.5.4+1.20.4-neoforge
release
ImmediatelyFast 1.5.4
1.20.41.20.31.20.21.20.1+1neoforge
2026-01-27 · 33.3K downloads
ImmediatelyFast-NeoForge-1.5.4+1.20.4.jar · 370 KB
1.14.1+1.21.11-fabric
release
ImmediatelyFast 1.14.1
1.21.11fabricquilt
2025-12-18 · 2.9M downloads
ImmediatelyFast-Fabric-1.14.1+1.21.11.jar · 301 KB
1.14.1+1.21.11-neoforge
release
ImmediatelyFast 1.14.1
1.21.11neoforge
2025-12-18 · 38.9K downloads
ImmediatelyFast-NeoForge-1.14.1+1.21.11.jar · 323 KB
1.13.4+1.21.10-neoforge
release
ImmediatelyFast 1.13.4
1.21.101.21.9neoforge
2025-12-18 · 5.2K downloads
ImmediatelyFast-NeoForge-1.13.4+1.21.10.jar · 325 KB
1.13.4+1.21.10-fabric
release
ImmediatelyFast 1.13.4
1.21.101.21.9fabricquilt
2025-12-18 · 569.5K downloads
ImmediatelyFast-Fabric-1.13.4+1.21.10.jar · 301 KB
1.12.4+1.21.8-neoforge
release
ImmediatelyFast 1.12.4
1.21.8neoforge
2025-12-18 · 3K downloads
ImmediatelyFast-NeoForge-1.12.4+1.21.8.jar · 322 KB
1.12.4+1.21.8-fabric
release
ImmediatelyFast 1.12.4
1.21.8fabricquilt
2025-12-18 · 232.1K downloads
ImmediatelyFast-Fabric-1.12.4+1.21.8.jar · 299 KB
1.8.5+1.21.4-forge
release
ImmediatelyFast 1.8.5
1.21.4forge
2025-12-18 · 3.2K downloads
ImmediatelyFast-Forge-1.8.5+1.21.4.jar · 529 KB
1.8.5+1.21.4-neoforge
release
ImmediatelyFast 1.8.5
1.21.4neoforge
2025-12-18 · 2.3K downloads
ImmediatelyFast-NeoForge-1.8.5+1.21.4.jar · 355 KB
1.8.5+1.21.4-fabric
release
ImmediatelyFast 1.8.5
1.21.4fabricquilt
2025-12-18 · 197.9K downloads
ImmediatelyFast-Fabric-1.8.5+1.21.4.jar · 330 KB
1.6.9+1.21.1-forge
release
ImmediatelyFast 1.6.9
1.21.11.21forge
2025-12-18 · 12.7K downloads
ImmediatelyFast-Forge-1.6.9+1.21.1.jar · 533 KB
1.6.9+1.21.1-fabric
release
ImmediatelyFast 1.6.9
1.21.11.21fabricquilt
2025-12-18 · 1.8M downloads
ImmediatelyFast-Fabric-1.6.9+1.21.1.jar · 334 KB
1.6.9+1.21.1-neoforge
release
ImmediatelyFast 1.6.9
1.21.11.21neoforge
2025-12-18 · 280.2K downloads
ImmediatelyFast-NeoForge-1.6.9+1.21.1.jar · 359 KB
1.14.0+1.21.11-fabric
release
ImmediatelyFast 1.14.0
1.21.11fabricquilt
2025-12-09 · 814.6K downloads
ImmediatelyFast-Fabric-1.14.0+1.21.11.jar · 192 KB
1.14.0+1.21.11-neoforge
release
ImmediatelyFast 1.14.0
1.21.11neoforge
2025-12-09 · 5.3K downloads
ImmediatelyFast-NeoForge-1.14.0+1.21.11.jar · 214 KB
1.13.3+1.21.10-fabric
release
ImmediatelyFast 1.13.3
1.21.101.21.9fabricquilt
2025-12-09 · 261.6K downloads
ImmediatelyFast-Fabric-1.13.3+1.21.10.jar · 192 KB
1.13.3+1.21.10-neoforge
release
ImmediatelyFast 1.13.3
1.21.101.21.9neoforge
2025-12-09 · 3.9K downloads
ImmediatelyFast-NeoForge-1.13.3+1.21.10.jar · 215 KB
1.12.3+1.21.8-neoforge
release
ImmediatelyFast 1.12.3
1.21.8neoforge
2025-12-09 · 702 downloads
ImmediatelyFast-NeoForge-1.12.3+1.21.8.jar · 213 KB
1.12.3+1.21.8-fabric
release
ImmediatelyFast 1.12.3
1.21.8fabricquilt
2025-12-09 · 73.8K downloads
ImmediatelyFast-Fabric-1.12.3+1.21.8.jar · 190 KB
1.8.3+1.21.4-fabric
release
ImmediatelyFast 1.8.3
1.21.4fabricquilt
2025-12-09 · 38.6K downloads
ImmediatelyFast-Fabric-1.8.3+1.21.4.jar · 219 KB
1.8.3+1.21.4-neoforge
release
ImmediatelyFast 1.8.3
1.21.4neoforge
2025-12-09 · 465 downloads
ImmediatelyFast-NeoForge-1.8.3+1.21.4.jar · 244 KB
1.8.3+1.21.4-forge
release
ImmediatelyFast 1.8.3
1.21.4forge
2025-12-09 · 515 downloads
ImmediatelyFast-Forge-1.8.3+1.21.4.jar · 419 KB
1.6.8+1.21.1-neoforge
release
ImmediatelyFast 1.6.8
1.21.11.21neoforge
2025-12-09 · 49.9K downloads
ImmediatelyFast-NeoForge-1.6.8+1.21.1.jar · 249 KB
1.6.8+1.21.1-fabric
release
ImmediatelyFast 1.6.8
1.21.11.21fabricquilt
2025-12-09 · 131.2K downloads
ImmediatelyFast-Fabric-1.6.8+1.21.1.jar · 223 KB
1.6.8+1.21.1-forge
release
ImmediatelyFast 1.6.8
1.21.11.21forge
2025-12-09 · 1.7K downloads
ImmediatelyFast-Forge-1.6.8+1.21.1.jar · 423 KB
1.5.3+1.20.4-fabric
release
ImmediatelyFast 1.5.3
1.20.41.20.31.20.21.20.1+1fabricquilt
2025-12-09 · 1.3M downloads
ImmediatelyFast-Fabric-1.5.3+1.20.4.jar · 237 KB
1.5.3+1.20.4-neoforge
release
ImmediatelyFast 1.5.3
1.20.41.20.31.20.21.20.1+1neoforge
2025-12-09 · 12.1K downloads
ImmediatelyFast-NeoForge-1.5.3+1.20.4.jar · 260 KB
1.5.3+1.20.4-forge
release
ImmediatelyFast 1.5.3
1.20.41.20.31.20.21.20.1+1forge
2025-12-09 · 880.3K downloads
ImmediatelyFast-Forge-1.5.3+1.20.4.jar · 417 KB
1.13.2+1.21.10-neoforge
release
ImmediatelyFast 1.13.2
1.21.101.21.9neoforge
2025-10-27 · 25.7K downloads
ImmediatelyFast-NeoForge-1.13.2+1.21.10.jar · 215 KB
1.13.2+1.21.10-fabric
release
ImmediatelyFast 1.13.2
1.21.101.21.9fabricquilt
2025-10-27 · 2M downloads
ImmediatelyFast-Fabric-1.13.2+1.21.10.jar · 192 KB
1.12.2+1.21.8-fabric
release
ImmediatelyFast 1.12.2
1.21.8fabricquilt
2025-10-27 · 488.6K downloads
ImmediatelyFast-Fabric-1.12.2+1.21.8.jar · 189 KB
1.12.2+1.21.8-neoforge
release
ImmediatelyFast 1.12.2
1.21.8neoforge
2025-10-27 · 5.6K downloads
ImmediatelyFast-NeoForge-1.12.2+1.21.8.jar · 213 KB
1.13.1+1.21.10-fabric
release
ImmediatelyFast 1.13.1
1.21.101.21.9fabricquilt
2025-10-07 · 974.2K downloads
ImmediatelyFast-Fabric-1.13.1+1.21.10.jar · 192 KB
1.13.1+1.21.10-neoforge
release
ImmediatelyFast 1.13.1
1.21.101.21.9neoforge
2025-10-07 · 9.6K downloads
ImmediatelyFast-NeoForge-1.13.1+1.21.10.jar · 215 KB
1.13.0+1.21.9-neoforge
release
ImmediatelyFast 1.13.0
1.21.9neoforge
2025-10-01 · 3.3K downloads
ImmediatelyFast-NeoForge-1.13.0+1.21.9.jar · 215 KB

Files are delivered unmodified from Modrinth's servers and verified against the SHA-512 hash published by the project. The project's license applies to every file; check it before redistributing.

About

ImmediatelyFast

ImmediatelyFast is an open source Minecraft mod which improves the immediate mode rendering performance of the client.
It is designed to be lightweight and compatible with other mods.

Optimizations

ImmediatelyFast generally optimizes all immediate mode rendering by using a custom buffer implementation which batches draw calls and uploads data to the GPU in a more efficient way.
The following parts of the immediate mode rendering code are optimized:

Entities
Block entities
Particles
Text rendering
GUI/HUD
Immediate mode rendering of other mods

It also features targeted optimizations where vanilla rendering code is being changed in order to run faster.
The following parts of the rendering code are optimized with a more efficient implementation:

Map rendering
HUD rendering
Text rendering

Performance

Here are some performance comparisons of areas the mod optimizes particularly well:

If other mods are listed in the table this means that this mod also optimizes that part of the game.

Test Hardware: Ryzen 5 1600, 32GB DDR4, GTX 1060

FPS Numbers were taken from external tools (in this case MSI Afterburner) and averaged over a couple of seconds.
If you decide to test this yourself keep in mind that ImmediatelyFast can only improve FPS in a scenario where your CPU is the bottleneck (Most likely the case if your GPU isn't ancient or you use very heavy shaders). Slower CPUs will benefit more from this mod than really fast CPUs.

Entity Rendering

Generally FPS should be around 2x higher on busy servers. [Tested using IF 1.1.7 on 1.19.3]

Tested on a spigot server with 1000 cows in a 3x3 box on screen.

Other mods	Without ImmediatelyFast	With ImmediatelyFast	Improvement
None	16 FPS	60 FPS	3.75x
Sodium	21 FPS	82 FPS	3.90x
Iris and Sodium	60 FPS	76 FPS	1.27x

Map Rendering

Generally FPS should be around 5x higher when there are many maps on screen. [Tested using IF 1.1.1 on 1.19.3]

Tested on a fabric server with the Image2Map mod and around 930 maps on screen.

Other mods	Without ImmediatelyFast	With ImmediatelyFast	Improvement
None	50 FPS	310 FPS	6.20x
Sodium	47 FPS	320 FPS	6.81x

HUD Rendering

Generally FPS should be around 40% higher in almost all scenarios. [Tested using IF 1.1.7 on 1.19.3]

Tested on a spigot server with different HUD elements on screen (Scoreboard, Potion effect overlay, Bossbars, Filled Chat, Extra hearts, Full Hotbar).

Other mods	Without ImmediatelyFast	With ImmediatelyFast	Improvement
None	250 FPS	380 FPS	1.52x
Sodium	335 FPS	630 FPS	1.88x
Exordium and Sodium	740 FPS	840 FPS	1.14x

Text Rendering

Generally FPS should be around 2x higher when there are many signs or holograms around you. [Tested using IF 1.1.7 on 1.19.3]

Tested on a spigot server with 200 signs (Filled with text) on screen.

Other mods	Without ImmediatelyFast	With ImmediatelyFast	Improvement
None	70 FPS	125 FPS	1.79x
Sodium	110 FPS	300 FPS	2.73x

Block-Entity Rendering

Generally FPS should be around 20% higher when there are many block entities around you. [Tested using IF 1.1.7 on 1.19.3]

Tested on a spigot server with 400 chests on screen.

Other mods	Without ImmediatelyFast	With ImmediatelyFast	Improvement
None	170 FPS	205 FPS	1.20x
Sodium	315 FPS	410 FPS	1.30x

Compatibility

ImmediatelyFast is structured to interfere with mods as little as possible. It should work fine with most if not all mods and modpacks.

Known incompatibilities:

OptiFabric / OptiFine
Most closed source "clients" like LunarClient and LabyMod

If you encounter any issues, please report them on the Issue Tracker.

Config

ImmediatelyFast has a config file which can be found in the config folder of your Minecraft instance. Most options should be left at their default values, but some may be tweaked to improve performance or compatibility.

font_atlas_resizing: Increases the sizes of the font atlas textures. This improves performance with high resolution or custom server fonts.
map_atlas_generation: Puts the map textures into a single texture instead of multiple textures. This improves performance when many maps are on screen.
hud_batching: Improves the performance of the HUD rendering by submitting less draw calls. If you experience issues with HUD elements, try disabling this optimization.
fast_text_lookup: Caches some data between rendering text characters. This slightly improves performance when rendering a lot of text.
avoid_redundant_framebuffer_switching: This optimization reduces the number of framebuffer switches when rendering many different things in the world (entities, particles, block entities, ...) or the HUD to increase FPS.
experimental_disable_error_checking: Disables OpenGL error checking. This may improve performance on certain systems, but can cause hard to debug issues if enabled.
experimental_disable_resource_pack_conflict_handling: Controls if ImmediatelyFast should scan resource packs for incompatible core shader modifications in oder to disable some conflicting optimizations. This can be disabled to force optimizations even if they may cause graphical issues with certain resource packs.
experimental_sign_text_buffering: Buffers text on signs instead of re-rendering it every frame. May cause issues with high resolution or custom fonts.
experimental_screen_batching: Improves the performance of some in-game screens rendering by submitting less draw calls.

Developer API

You can read the latest version of the API docs here.

Partners

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Credits to sydist for making the logo!

ImmediatelyFast

Files

1.6.15+1.21.1-fabric

1.6.15+1.21.1-forge

1.6.15+1.21.1-neoforge

1.17.1+26.3-neoforge

1.17.1+26.3-fabric

1.17.0+26.3-fabric

1.17.0+26.3-neoforge

1.16.5+26.2-fabric

1.16.5+26.2-neoforge

1.6.14+1.21.1-forge

1.6.14+1.21.1-fabric

1.6.14+1.21.1-neoforge

1.16.4+26.2-fabric

1.16.4+26.2-neoforge

1.6.13+1.21.1-forge

1.6.13+1.21.1-neoforge

1.6.13+1.21.1-fabric

1.16.3+26.2-neoforge

1.16.3+26.2-fabric

1.6.12+1.21.1-fabric

1.6.12+1.21.1-forge

1.6.12+1.21.1-neoforge

1.16.2+26.2-neoforge

1.16.2+26.2-fabric

1.15.3+26.1-fabric

1.15.3+26.1-neoforge

1.14.3+1.21.11-neoforge

1.14.3+1.21.11-fabric

1.13.6+1.21.10-neoforge

1.13.6+1.21.10-fabric

1.12.6+1.21.8-fabric

1.12.6+1.21.8-neoforge

1.8.7+1.21.4-forge

1.8.7+1.21.4-neoforge

1.8.7+1.21.4-fabric

1.6.11+1.21.1-fabric

1.6.11+1.21.1-neoforge

1.6.11+1.21.1-forge

1.5.5+1.20.4-neoforge

1.5.5+1.20.4-forge

1.5.5+1.20.4-fabric

1.16.1+26.2-fabric

1.16.1+26.2-neoforge

1.16.0+26.2-neoforge

1.16.0+26.2-fabric

1.15.2+26.1.2-neoforge

1.15.2+26.1.2-fabric

1.15.1+26.1.1-fabric

1.15.1+26.1.1-neoforge

1.15.0+26.1-neoforge

1.15.0+26.1-fabric

1.14.2+1.21.11-neoforge

1.14.2+1.21.11-fabric

1.13.5+1.21.10-neoforge

1.13.5+1.21.10-fabric

1.12.5+1.21.8-neoforge

1.12.5+1.21.8-fabric

1.8.6+1.21.4-neoforge

1.8.6+1.21.4-forge

1.8.6+1.21.4-fabric

1.6.10+1.21.1-neoforge

1.6.10+1.21.1-forge

1.6.10+1.21.1-fabric

1.5.4+1.20.4-forge

1.5.4+1.20.4-fabric

1.5.4+1.20.4-neoforge

1.14.1+1.21.11-fabric

1.14.1+1.21.11-neoforge

1.13.4+1.21.10-neoforge

1.13.4+1.21.10-fabric

1.12.4+1.21.8-neoforge

1.12.4+1.21.8-fabric

1.8.5+1.21.4-forge

1.8.5+1.21.4-neoforge

1.8.5+1.21.4-fabric

1.6.9+1.21.1-forge

1.6.9+1.21.1-fabric

1.6.9+1.21.1-neoforge