Five Patterns, One Pipeline
Five patterns form a complete pipeline. Each solves its own problem AND helps the next. Together they achieve 99.4% data reduction while preserving all content.╔═════════════════════════════════════════════════════════════════╗
║ COMPLETE 5-PATTERN PIPELINE ║
╠═════════════════════════════════════════════════════════════════╣
║ ║
║ PTY Output ║
║ │ ║
║ ▼ ║
║ ┌───────────────────────────────────────────────────────┐ ║
║ │ PATTERN 1: Unbounded Channel │ ║
║ │ Guarantee: NO DATA LOSS │ ║
║ └───────────────────────────────────────────────────────┘ ║
║ │ ║
║ ▼ ║
║ ┌───────────────────────────────────────────────────────┐ ║
║ │ PATTERN 2: Unix Socket │ ║
║ │ Guarantee: NATURAL BACKPRESSURE │ ║
║ └───────────────────────────────────────────────────────┘ ║
║ │ ║
║ ▼ ║
║ ┌───────────────────────────────────────────────────────┐ ║
║ │ PATTERN 3: Actor (SessionActor) │ ║
║ │ Guarantee: NO RACE CONDITIONS, ORDERED PROCESSING │ ║
║ └───────────────────────────────────────────────────────┘ ║
║ │ ║
║ ▼ ║
║ ┌───────────────────────────────────────────────────────┐ ║
║ │ PATTERN 4: State Absorber │ ║
║ │ Guarantee: FIXED MEMORY, LATEST STATE ONLY │ ║
║ └───────────────────────────────────────────────────────┘ ║
║ │ ║
║ ▼ ║
║ ┌───────────────────────────────────────────────────────┐ ║
║ │ PATTERN 5: ACK Flow Control │ ║
║ │ Guarantee: SCREEN STABILITY (60fps) │ ║
║ └───────────────────────────────────────────────────────┘ ║
║ │ ║
║ ▼ ║
║ xterm.js WebGL Render ║
║ ║
╚═════════════════════════════════════════════════════════════════╝
Synergy Matrix
Each pattern solves its own problem AND helps others:╔═════════════════════════════════════════════════════════════════╗
║ HOW PATTERNS HELP EACH OTHER ║
╠═════════════════════════════════════════════════════════════════╣
║ ║
║ ┌────────────────┬────────────────────────┬──────────────────┐ ║
║ │ Pattern │ Own Guarantee │ Helps Next │ ║
║ ├────────────────┼────────────────────────┼──────────────────┤ ║
║ │ │ │ │ ║
║ │ 1. Unbounded │ No data loss │ All downstream │ ║
║ │ Channel │ │ receives data │ ║
║ │ │ │ │ ║
║ ├────────────────┼────────────────────────┼──────────────────┤ ║
║ │ │ │ │ ║
║ │ 2. Unix │ Natural backpressure │ Channel does not │ ║
║ │ Socket │ (~208KB limit) │ grow infinitely │ ║
║ │ │ │ │ ║
║ ├────────────────┼────────────────────────┼──────────────────┤ ║
║ │ │ │ │ ║
║ │ 3. Actor │ No race conditions │ State receives │ ║
║ │ │ Ordered processing │ ordered updates │ ║
║ │ │ │ │ ║
║ ├────────────────┼────────────────────────┼──────────────────┤ ║
║ │ │ │ │ ║
║ │ 4. State │ Fixed memory │ ACK handles only │ ║
║ │ Absorber │ Latest state only │ coalesced state │ ║
║ │ │ │ │ ║
║ ├────────────────┼────────────────────────┼──────────────────┤ ║
║ │ │ │ │ ║
║ │ 5. ACK │ Screen stability │ Frontend renders │ ║
║ │ │ 60fps guarantee │ at stable rate │ ║
║ │ │ │ │ ║
║ └────────────────┴────────────────────────┴──────────────────┘ ║
║ ║
╚═════════════════════════════════════════════════════════════════╝
Reverse Dependency
Later patterns help earlier ones stay efficient:╔═══════════════════════════════════════════════════════════════════╗
║ CIRCULAR BENEFIT SYSTEM ║
╠═══════════════════════════════════════════════════════════════════╣
║ ║
║ ACK (5) ────────────────────────────────────────▶ Absorber (4) ║
║ ║
║ ACK slows emit rate (60/sec max) ║
║ │ ║
║ └───▶ State absorbs more updates per emit ║
║ └───▶ Data reduction ratio increases ║
║ ║
║ ─────────────────────────────────────────────────────────── ║
║ ║
║ Absorber (4) ──────────────────────────────────────▶ Actor (3) ║
║ ║
║ State processes instantly (just overwrite) ║
║ │ ║
║ └───▶ Actor's MPSC queue stays short ║
║ └───▶ Actor loop runs fast ║
║ ║
║ ─────────────────────────────────────────────────────────── ║
║ ║
║ Actor (3) ─────────────────────────────────────────▶ Socket (2) ║
║ ║
║ Actor reads socket continuously ║
║ │ ║
║ └───▶ Socket drains quickly ║
║ └───▶ PTY Daemon stays fast ║
║ ║
║ ─────────────────────────────────────────────────────────── ║
║ ║
║ Socket (2) ────────────────────────────────────────▶ Channel (1)║
║ ║
║ Socket drains quickly ║
║ │ ║
║ └───▶ Channel drains quickly ║
║ └───▶ Memory stays low ║
║ ║
╚═══════════════════════════════════════════════════════════════════╝
Data Reduction Flow
╔═════════════════════════════════════════════════════════════════╗
║ DATA REDUCTION: 10,000 -> 60 ║
╠═════════════════════════════════════════════════════════════════╣
║ ║
║ PTY Output: 10,000 updates/sec ║
║ │ ║
║ ▼ ║
║ 1. Unbounded Channel ───▶ 10,000/sec (NO reduction, NO loss) ║
║ │ ║
║ ▼ ║
║ 2. Unix Socket ─────────▶ 10,000/sec (backpressure only) ║
║ │ ║
║ ▼ ║
║ 3. Actor ───────────────▶ 10,000/sec (ordering only) ║
║ │ ║
║ ▼ ║
║ 4. State Absorber ──────▶ ~500/sec (95% reduction) ║
║ │ ^^^^^^^^ ║
║ │ FIRST MAJOR REDUCTION ║
║ ▼ ║
║ 5. ACK ─────────────────▶ 60/sec (88% reduction) ║
║ │ ^^^^^^^ ║
║ │ SECOND MAJOR REDUCTION ║
║ ▼ ║
║ Frontend: 60 renders/sec ║
║ ║
║ ─────────────────────────────────────────────────────────── ║
║ ║
║ TOTAL: 10,000/sec -> 60/sec = 99.4% reduction ║
║ ║
║ All 10,000 updates are PROCESSED (by Alacritty VTE parser) ║
║ Only EMISSION to frontend is reduced ║
║ NO DATA LOSS - only STATE COALESCING ║
║ ║
╚═════════════════════════════════════════════════════════════════╝
Why All 5 Patterns Are Needed
╔═════════════════════════════════════════════════════════════════╗
║ WHAT HAPPENS WITHOUT EACH PATTERN? ║
╠═════════════════════════════════════════════════════════════════╣
║ ║
║ WITHOUT Pattern 1 (Unbounded Channel): ║
║ • Bounded channel would drop data when full ║
║ • Terminal output corrupted, missing content ║
║ • User sees incomplete results ║
║ ║
║ ─────────────────────────────────────────────────────────── ║
║ ║
║ WITHOUT Pattern 2 (Unix Socket): ║
║ • No kernel-level backpressure ║
║ • Channel could grow infinitely ║
║ • Memory explosion if Tauri is slow ║
║ ║
║ ─────────────────────────────────────────────────────────── ║
║ ║
║ WITHOUT Pattern 3 (Actor): ║
║ • Multiple threads accessing state simultaneously ║
║ • Race conditions, data corruption ║
║ • Locks required -> contention -> slowdown ║
║ ║
║ ─────────────────────────────────────────────────────────── ║
║ ║
║ WITHOUT Pattern 4 (State Absorber): ║
║ • Need queue between Actor and ACK ║
║ • Queue grows: 10,000 - 60 = 9,940 items/sec ║
║ • Memory grows indefinitely ║
║ ║
║ ─────────────────────────────────────────────────────────── ║
║ ║
║ WITHOUT Pattern 5 (ACK): ║
║ • Frontend receives all ~500 states/sec ║
║ • xterm.js event queue grows ║
║ • Frame drops, stuttering, screen instability ║
║ ║
╚═════════════════════════════════════════════════════════════════╝
Memory Control Points
╔═════════════════════════════════════════════════════════════════╗
║ WHERE MEMORY IS CONTROLLED ║
╠═════════════════════════════════════════════════════════════════╣
║ ║
║ PTY DAEMON TAURI BACKEND FRONTEND ║
║ ║
║ ┌────────────┐ ║
║ │ PTY │ ║
║ │ Master │ ║
║ └─────┬──────┘ ║
║ │ read() ║
║ ▼ ║
║ ┌────────────┐ Point A: Can grow if socket blocks ║
║ │ Unbounded │ (But socket rarely blocks) ║
║ │ Channel │ ║
║ └─────┬──────┘ ║
║ │ ║
║ ▼ ║
║ ╔════════════╗ Actual Backpressure Point ║
║ ║ UNIX ║ Kernel ~208KB ║
║ ║ SOCKET ║ write() BLOCKS when full ║
║ ╚══════╤═════╝ ║
║ │ ┌────────────────┐ ║
║ └────────────▶│ SessionActor │ Point B: MPSC queue ║
║ │ (SINGLE OWNER) │ (Stays short) ║
║ └───────┬────────┘ ║
║ │ ║
║ ▼ ║
║ ┌────────────────┐ Point C: FIXED SIZE ║
║ │ State Absorber │ OVERWRITES always ║
║ └───────┬────────┘ ║
║ │ ║
║ ▼ ║
║ ┌────────────────┐ ║
║ │ ACK Control │─────▶ xterm.js ║
║ └────────────────┘ ║
║ ▲ ║
║ │ ║
║ ┌────────────────┐ ║
║ │ grid_ack() │◀───── Frontend ║
║ └────────────────┘ ║
║ ║
╚═════════════════════════════════════════════════════════════════╝
Pattern Origins
These are not new inventions. They are proven patterns, combined for terminal rendering.╔═════════════════════════════════════════════════════════════════╗
║ INDUSTRY-PROVEN SOLUTIONS ║
╠═════════════════════════════════════════════════════════════════╣
║ ║
║ ┌────────────────┬──────────────────┬─────────────────────────┐║
║ │ Pattern │ Origin │ Proven In │║
║ ├────────────────┼──────────────────┼─────────────────────────┤║
║ │ │ │ │║
║ │ 1. Unbounded │ Rust std library │ Async systems, │║
║ │ Channel │ (MPSC) │ message passing │║
║ │ │ │ │║
║ ├────────────────┼──────────────────┼─────────────────────────┤║
║ │ │ │ │║
║ │ 2. Unix │ BSD (1983) │ 40+ years of network │║
║ │ Socket │ │ programming │║
║ │ │ │ │║
║ ├────────────────┼──────────────────┼─────────────────────────┤║
║ │ │ │ │║
║ │ 3. Actor │ Carl Hewitt 1973 │ Erlang telecom │║
║ │ Model │ Erlang 1986 │ (99.9999999% uptime) │║
║ │ │ │ │║
║ ├────────────────┼──────────────────┼─────────────────────────┤║
║ │ │ │ │║
║ │ 4. Coalescing │ GUI frameworks │ React batching, │║
║ │ │ (decades old) │ game engines │║
║ │ │ │ │║
║ ├────────────────┼──────────────────┼─────────────────────────┤║
║ │ │ │ │║
║ │ 5. ACK Flow │ TCP/IP (1974) │ Every internet │║
║ │ Control │ Vint Cerf │ connection │║
║ │ │ │ │║
║ └────────────────┴──────────────────┴─────────────────────────┘║
║ ║
║ MonoTerm's innovation: Combining them in the VTE parsing layer ║
║ ║
╚═════════════════════════════════════════════════════════════════╝
Summary
╔═════════════════════════════════════════════════════════════════╗
║ FIVE PATTERN SYNERGY: KEY TAKEAWAYS ║
╠═════════════════════════════════════════════════════════════════╣
║ ║
║ 1. Five patterns form a complete pipeline ║
║ 2. Each pattern has ONE guarantee ║
║ 3. Each pattern helps the next (forward dependency) ║
║ 4. Each pattern's efficiency helps the previous (reverse) ║
║ 5. Remove any pattern -> system fails ║
║ 6. Together: 99.4% data reduction, zero data loss, stable 60fps║
║ ║
║ ─────────────────────────────────────────────────────────── ║
║ ║
║ Pattern 1 (Unbounded) -> No data loss ║
║ Pattern 2 (Socket) -> Backpressure ║
║ Pattern 3 (Actor) -> Ordering ║
║ Pattern 4 (Absorber) -> Memory stability + Temporal sync ║
║ Pattern 5 (ACK) -> Screen stability ║
║ ║
║ COMBINED: AI-native terminal that handles any output volume ║
║ ║
╚═════════════════════════════════════════════════════════════════╝