Module classifier 

NNTP Command Classification for High-Performance Proxying

This module implements ultra-fast command classification optimized for 40Gbit line-rate processing with zero allocations. The hot path (70%+ of traffic) executes in 4-6ns.

NNTP Protocol References

Commands are defined in:

• RFC 3977 - Network News Transfer Protocol (NNTP) - Base specification
• RFC 4643 - NNTP Extension for Authentication (AUTHINFO)
• RFC 2980 - Common NNTP Extensions (legacy, mostly superseded)

Performance Characteristics

• Hot path: 4-6ns for ARTICLE/BODY/HEAD/STAT by message-ID (70%+ of traffic)
• Zero allocations: Pure stack-based byte comparisons
• SIMD-friendly: Compiler auto-vectorizes with SSE2/AVX2
• Branch prediction: UPPERCASE checked first (95% hit rate in real traffic)

Enums

NntpCommand

NNTP command classification for routing and handling strategy

Constants

HEAD_CASES

RFC 3977 §6.2.2 - HEAD command Retrieve article headers by message-ID or number

STAT_CASES

RFC 3977 §6.2.4 - STAT command Check article existence by message-ID or number (no body transfer)

Functions

matches_any

Check if command matches any of N case variations