obsidian-vault/work/wiki/apple-browsers/network-quality-test-config.md

source, confidence, namespace, last_synced, alwaysApply

source	confidence	namespace	last_synced	alwaysApply
~/DuckDuckGo/apple-browsers.git/main/.cursor/rules/network-quality-test-config.mdc	0.9	work	2026-04-28	false

NetworkQualityMonitor Test Configuration

Optimized Test Parameters

The NetworkQualityMonitor uses carefully tuned parameters to balance speed and accuracy for browser performance testing.

Test Phases and Data Sizes

HTTP Response Testing (Latency)

• Samples: 15 per endpoint
• Endpoints: ~12 globally distributed CDNs and services
• Methodology: Warm-up phase + interleaved sampling
• Timeout: 5 seconds
• Total time: ~3-4 minutes

Bandwidth Testing (Download)

• File size: 50MB per server (reduced from 100MB)
• Servers: 3 test servers (CloudFlare, OVH, Hetzner)
• Runs: 1 per server (reduced from 2)
• Total download: ~150MB (was 800MB)
• Timeout: 20 seconds per server
• Measurement window:
  • At 100 Mbps: ~4 seconds
  • At 25 Mbps: ~16 seconds
  • At 10 Mbps: ~40 seconds

Upload Testing

• Chunk size: 20MB (reduced from 50MB)
• Chunks: 2 sequential uploads
• Total upload: 40MB (was 100MB)
• Timeout: 25 seconds total
• Servers: 3 endpoints

DNS Resolution Testing

• Domains: 11 popular domains
• Tests: Resolution time and failure rate
• Timeout: Default system resolver timeout

Performance Optimizations

Why These Sizes?

50MB for Downloads:

• Large enough to overcome TCP slow start
• Provides stable measurement window (4-40 seconds)
• Small enough to complete quickly on slower connections
• Balances accuracy with user experience

20MB for Uploads:

• Sufficient to measure upload capacity
• Most users have asymmetric connections (slower upload)
• Reduces test time significantly

Total Test Duration

Typical completion times:

• Fast connection (100+ Mbps): ~2-3 minutes
• Good connection (25-50 Mbps): ~3-4 minutes
• Fair connection (10-25 Mbps): ~4-5 minutes
• Poor connection (<10 Mbps): ~5-7 minutes

Data Usage

Total data transferred:

• Download: ~150MB
• Upload: ~40MB
• Total: ~190MB (reduced from ~900MB)

Configuration Code

TestConfiguration(
    latencyTestURLs: [/* 12 CDN endpoints */],
    bandwidthTestURLs: [
        "https://speed.cloudflare.com/__down?bytes=52428800",  // 50MB
        "https://proof.ovh.net/files/50Mb.dat",                // 50MB
        "https://speed.hetzner.de/50MB.bin"                    // 50MB
    ],
    uploadTestURLs: [/* 3 upload endpoints */],
    dnsTestDomains: [/* 11 popular domains */],
    latencySamplesPerEndpoint: 15,
    bandwidthRunsPerServer: 1,
    uploadChunkSize: 20_971_520,    // 20MB
    uploadChunkCount: 2,
    latencyTestTimeout: 5,
    bandwidthTestTimeout: 20,
    uploadTestTimeout: 25
)

Quick Test Mode

For rapid connectivity checks, the system also supports:

• 10MB quick downloads for server selection
• HEAD requests for basic connectivity
• Reduced sample counts for faster results