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@sleep3r sleep3r released this 05 Apr 13:00
v0.6.0
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⚡ Architectural Leap: Epoll Rewrite & Ultra-Optimization

This release fundamentally reimagines the core of mtproto.zig. The entire networking layer has been rewritten from a thread-per-connection model to a native Linux epoll event loop with a pre-allocated connection pool and non-blocking state machine. The result is extreme connection density at minimal resource cost.

🚀 Highlights

Epoll Event Loop

Fully non-blocking I/O on a single thread. The proxy now scales to tens of thousands of concurrent connections while keeping latency under 10 ms.

Extreme Memory Efficiency

  • Baseline RSS under 1 MB — the smallest footprint among all tested MTProto proxy implementations.
  • 8.8 MB RSS at 2,000 active TLS-auth connections — ~90% more efficient than Go/Rust alternatives.
  • 49 MB RSS at 12,000 idle held sockets — 1.5–2.5× less than C-based implementations.
  • On-demand heap allocation for idle connections; slab-based MessageQueue buffer pooling for active relay.

Protocol Hardening & DPI Evasion

  • DRS (Dynamic Record Sizing): TLS record sizes ramp from 1,369 → 16,384 bytes after warmup, mimicking real Chrome/Firefox browser behavior to resist fingerprinting.
  • TCP MSS=88: Forces ClientHello fragmentation across 6 TCP packets, breaking ISP DPI reassembly.
  • Split-TLS: 1-byte application-level record chunking to defeat passive DPI signatures.
  • Zero-RTT Cloaking: Local Nginx deployed on-the-fly to defeat active probing timing analysis.

Additional Improvements

  • Configurable TCP listen backlog (default 4096) for high-traffic deployments.
  • Startup capacity estimate printed at boot.
  • IPv4-only host support (graceful fallback when IPv6 is unavailable).
  • Automatic MiddleProxy metadata refresh from Telegram endpoints with bundled fallback.

📊 Benchmark Snapshot (VPS 1 vCPU / 1 GB RAM, Ubuntu 24.04)

Baseline Footprint

Proxy Language Binary Baseline RSS Startup
mtproto.zig Zig 177 KB 0.75 MB < 10 ms
Official MTProxy C 524 KB 8.0 MB < 10 ms
Teleproxy C 14 MB 4.5 MB ~ 30 ms
Telemt Rust 15 MB 12.1 MB ~ 5-6 s
mtg Go 13 MB 11.6 MB ~ 30 ms
mtprotoproxy Python N/A 34.9 MB ~ 800 ms

TLS-auth Active Memory @ 2,000 Connections

Proxy RSS @ 2000 Established Status
mtproto.zig 8,832 KB 2,000 ✅ stable
Teleproxy 20,952 KB 2,000 ✅ stable
Official MTProxy 23,296 KB 2,000 ✅ stable
Telemt 38,272 KB 2,000 ✅ stable
mtg 55,296 KB 0 ⚠ partial

Idle Memory @ 12,000 Held Sockets

Proxy RSS @ 12000 Established Status
mtproto.zig 49,024 KB 12,000 ✅ stable
Telemt 70,032 KB 11,023 ⚠ partial
Official MTProxy 74,116 KB 12,000 ✅ stable
Teleproxy 77,864 KB 12,000 ✅ stable
mtg 97,792 KB 7,287 ⚠ partial

Built with pure Zig 0.15.2 — zero external dependencies.

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