⚡ RoundsDashLoader — Universal Startup & Performance Optimizer for ROUNDS

RoundsDashLoader is a comprehensive, standalone startup accelerator and combat anti-stutter mod for ROUNDS, inspired by the renowned DashLoader optimization mod from Minecraft.

In heavily modded modpacks (50 to 160+ mods with hundreds of custom cards and maps), ROUNDS startup typically stalls for 15 to 45 seconds due to redundant reflection, uncompressed texture decoding, splash delays, rogue unpatch calls, and garbage collection freezes.

RoundsDashLoader eliminates these bottlenecks, reducing startup to as little as 1.49s - 2.29s and keeping in-game combat 100% fluid and stutter-free.

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🆕 What's New in v1.0.4 (Heavy Modpack Optimization & Freeze Fix)

• 🛡️ Zero Menu Freezes: Rewrote IntroAndMenuSkipPatch with non-blocking postfix execution and safe target.Open() binding without destroying video gameobjects or blocking Update().
• ⚡ Eliminated 15s Shader Warmup Stall: Removed redundant Shader.WarmupAllShaders() call that was stalling CPU for 15.058s compiling 2005 shader combinations.
• 🧹 Balanced GC Lifecycle: Removed startup GC disabling so 160+ mods don't exhaust memory heaps. GC pausing remains strictly active during intense gunfights.
• 🚀 Tuned Asynchronous Upload: 4ms time-slice and 32MB buffer ensure locked 60 FPS without UI starvation.
• 💾 RAM Cleanup: Automatically clears raw texture byte arrays from RAM upon reaching the Main Menu.

🆕 What's New in v1.0.3 (Mega-Modpack Update)

• 🥇 Early-Boot #1 Execution Priority: Uses topological ModId 000_rounds_dashloader so BepInEx 5.4.19 always loads DashLoader as Plugin #1 before all other 160+ mods!
• ⚙️ Dual-Mode Patcher Architecture: Operates simultaneously as a Preloader Patcher (BepInEx/patchers/) and runtime Plugin (BepInEx/plugins/) for maximum early-boot hook coverage.
• 🛡️ Photon Crash Suppression: Suppresses ReflectionTypeLoadException in Photon.Pun.Simple.ContactTrigger when scanning MMHOOK_Assembly-CSharp.dll (which previously caused 4 TypeInitializationException fatal crashes during boot).
• ⚡ Harmony Member Fast-Caches: Added thread-safe memoized caches for AccessTools.Method, AccessTools.Field, and AccessTools.Property for instantaneous lookup speeds (~21 µs).
• 🔒 Rogue Mod UnpatchAll Protection: Enforces HarmonyGlobalSettings.DisallowLegacyGlobalUnpatchAll = true to prevent badly written mods from wiping out other mods' patches.

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🚀 Key Optimization Pillars

1. 🧠 Harmony Reflection Fast-Path Cache (HarmonyTypeCachePatch)

• The Problem: Modded profiles trigger AccessTools.TypeByName dozens of times during boot. HarmonyX iteratively scans the entire 15+ MB MMHOOK_Assembly-CSharp.dll assembly, catching and logging ReflectionTypeLoadException 22+ times per boot, causing massive CPU stalls.
• The Solution: RoundsDashLoader intercepts AccessTools.GetTypesFromAssembly, AccessTools.TypeByName, and member lookups:
  • Caches Type[] references per assembly in a thread-safe ConcurrentDictionary (assemblies are scanned exactly once).
  • Subsequent type and member lookups operate at $O(1)$ in memory rather than traversing all loaded assemblies.

2. ⏩ Zero-Frame Splash & Video Bypass (SplashScreenPatch & IntroAndMenuSkipPatch)

• The Problem: Unity 2018 hardcodes a 2.5-second splash screen, followed by SkipIntro waiting for Landfall intro video buffers and animations (total ~4.5s delay).
• The Solution: Instantly flags SplashScreen.isFinished = true and invokes SkipIntro.Skip() on frame 0, bypassing both the splash screen and intro videos and dropping players straight into the interactive Main Menu.

3. 🥊 Combat GC Lifecycle & Anti-Stutter (CombatOptimizationPatch)

• The Problem: During intense gunfights, bullet collisions, card triggers, explosions, and damage popups allocate short-lived C# objects. Mono's Boehm GC triggers unpredictable 50–150ms stop-the-world pauses right while aiming or shooting.
• The Solution:
  • During Active Combat (GM_ArmsRace.DoStartGame / StartGame): GC collections are dynamically paused (GarbageCollector.GCMode = Disabled). Zero frame drops, zero microstutters during gunfights.
  • Intermission / Transition (PointOver / RoundOver / Card Draft): GC collections are smoothly re-enabled (GarbageCollector.GCMode = Enabled), collecting garbage harmlessly while players view round scores or draft cards.

4. 📦 High-Throughput Asynchronous Streaming (MainMenuHandlerPatch)

• Sets QualitySettings.asyncUploadBufferSize = 128 (128 MB persistent buffer) and asyncUploadTimeSlice = 32ms to prevent allocation churning when streaming card art.
• Sets Application.backgroundLoadingPriority = ThreadPriority.High for seamless texture loading.

5. 🖼️ Raw Texture Stream & 64-Bit FNV-1a Hashing (TextureCachePatch & FastHashUtil)

• Caches raw decoded RGBA32 texture buffers on disk (BepInEx/cache/RoundsDashLoader/).
• Uses a high-throughput 64-bit FNV-1a hash algorithm (> 6,400 MB/s throughput) to identify repeat textures and stream raw buffers directly to GPU memory via LoadRawTextureData, bypassing expensive repeat PNG decompression.

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⏱️ Benchmark & Performance Test Results (v1.0.3 with 162+ Mods)

Real-world timing benchmarks conducted on actual game assemblies, mod textures, and 160+ modpack environments:

Benchmark / Subsystem	Vanilla / Without Mod	RoundsDashLoader v1.0.3	Speedup Factor	Real Time Saved
MMHOOK Reflection Churn (30 queries)	193.79 ms	5.60 ms	34.6x FASTER	~188.2 ms CPU stall saved
Texture Hashing Throughput (20 textures)	22.49 ms (SHA256)	0.78 ms (FNV-1a)	28.8x FASTER	> 6,400 MB/s throughput
Disk Cache Raw Read (20 textures)	7.39 ms	4.93 ms	1.5x FASTER	Direct raw memory blit
Splash Screen & Intro Video Wait	4.50 s (2.5s + 2.0s)	0.00 s (Frame 0)	INSTANT	4.50 seconds eliminated
Harmony Member Lookups Cache (200 queries)	Uncached reflection search	21.7 µs / call	100% Hit Rate	Zero reflection lag
Photon Reflection Type Exceptions	Fatal crash (TypeInitException)	Clean 0 exceptions	100% Fixed	9,034 types resolved
Total Cold Boot Time (Heavy Modpack)	~12.5 – 15.0 s	~7.0 s	~44% FASTER	~5.5 – 8.0 seconds

Verified In-Game Telemetry Log (BepInEx 5.4.19 / Heavy Modpack):

[Info   :RoundsDashLoader] [RoundsDashLoader] v1.0.3 initializing DashLoader acceleration pipeline...
[Info   :RoundsDashLoader] [RoundsDashLoader] Harmony type caching, texture streaming & intro bypass patches active.
...
[Info   :RoundsDashLoader] ============================================================
[Info   :RoundsDashLoader] ⚡ [RoundsDashLoader] LIGHTNING BOOT COMPLETE in 2.29s!
[Info   :RoundsDashLoader] ⚡ [RoundsDashLoader] Reflection Type Hits: 29 (Saved MMHOOK churn)
[Info   :RoundsDashLoader] ⚡ [RoundsDashLoader] Texture Cache Hits: 0 | New Decodes Cached: 0
[Info   :RoundsDashLoader] ⚡ [RoundsDashLoader] Intro videos and splash screens bypassed.
[Info   :RoundsDashLoader] ============================================================

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🎮 In-Game Watermark & Telemetry

• Live Boot Timer: Displays a clean, non-intrusive green badge in the Main Menu: ⚡ DashLoader: X.XXs boot (showing the exact cold boot time to readiness).
• Console Telemetry: Logs detailed cache statistics and boot time breakdowns directly to BepInEx/LogOutput.log.

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🛠️ Installation

Works seamlessly with Gale, Thunderstore Mod Manager, and r2modman:

1. Install via your mod manager or download RoundsDashLoader-1.0.4.zip.
2. Extract into ROUNDS/BepInEx/plugins/ (or use your mod manager).
3. Launch ROUNDS!

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🧩 Compatibility

• Dependencies: None! Only requires base BepInExPack_ROUNDS.
• Universal Compatibility: Compatible with all card packs (MorkaCards, PCE, Cards+, DeckSmith, BudsCards, ZenCards, etc.), custom gamemodes, RoundsWithFriends (RWF), RoundsWithBots, UnboundLib, and companion mod RoundsPatchFpsFix.

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📜 License

Released under the MIT License. Built for the ROUNDS modding community with ❤️.