ltping — HTTP/DNS/TCP latency tool

ltping is a command-line tool for measuring HTTP, DNS, and TCP latency with SLO validation and HDR histogram statistics.

Open-source edition (AGPL-3.0) by LatenceTech.

Features

• HTTP latency with full percentile distribution (p50, p75, p90, p95, p99, p99.9)
• DNS resolution latency measurement
• ICMP ping — average, min, max (requires sudo)
• HDR Histogram with coordinated omission correction (Gil Tene)
• SLO validation — define thresholds in YAML, get pass/fail per site
• Multi-language output (EN, FR, ES, DE, JA, ZH, PT)
• CSV export with histogram blobs for offline analysis
• Interval mode (--interval) for continuous monitoring
• Sites file (sites.yaml) for batch multi-site testing

Installation

pip install ltping

Quick start

# Single site
ltping https://example.com

# Multiple sites from config file
ltping --sites-file sites.yaml

# Continuous monitoring every 60 s
ltping https://example.com --interval 60

# Export to CSV
ltping --sites-file sites.yaml --csv results.csv

Configuration

Create a ltping.yaml file:

nb_measures: 10
timeout: 10
language: EN
verbosity: full

Create a sites.yaml file:

- url: https://example.com
  slo:
    http_p95_ms: 500
    dns_ms: 100

- url: https://github.com
  slo:
    http_p99_ms: 1000
    http_p95_ms: 500

SLO keys

PRO edition

The ltping-pro commercial edition adds:

• ICMP jitter and packet loss (+ MOS voice quality score)
• TCP handshake latency
• TLS handshake latency + certificate inspection
• CDN detection (Cloudflare, CloudFront, Fastly, Akamai…)
• MTU path discovery
• Traceroute with per-hop jitter/loss
• MOS voice-quality score (ITU-T G.107)
• Prometheus export
• Webhook alerts
• Baseline comparison

→ latencetech.com

License

AGPL-3.0 — see LICENSE for details.