# microsoft/ethr

Ethr is a Comprehensive Network Measurement Tool for TCP, UDP & ICMP.

Repository: https://github.com/microsoft/ethr
Canonical: https://ross.abutalabs.com/products/ethr
Language: Go
License: MIT
License Family: permissive
Last push: 2026-07-03T13:14:22+00:00

## Health v2 (maintenance only)
Score: 63/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 90, release rhythm 8, longevity 100
- inputs: {"age_days": 2838, "days_push": 61, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 5866, forks 406 (observed 2026-08-28T04:09:31.776984+00:00)

## What it is
Ethr is a cross-platform network performance measurement tool written in Go that measures bandwidth, connections/s, packets/s, latency, loss, and jitter over TCP, UDP, HTTP, HTTPS, and ICMP. It unifies the functionality of tools like iPerf3, ntttcp, psping, sockperf, and latte into a single client/server tool.

## Use cases
- measure tcp and udp bandwidth between two hosts
- test network latency and jitter
- benchmark connections per second on a server
- measure packets per second throughput
- cross-platform iperf3 alternative for windows and linux
- measure tcp connection setup latency
- run network performance tests with many concurrent threads

## When to choose
- you need one tool for bandwidth, latency, and connection-rate measurements across platforms
- you need high thread/connection counts (1024+) or multiple clients against one server
- you want a native cross-platform tool without cygwin or compilation hassle

## When to avoid
- you need iPerf3's richer options like throttled testing or advanced traffic shaping
- you only need simple ping-style checks
- you need protocol support beyond TCP, UDP, HTTP(S), and ICMP

## Facets
- artifact type: cli-tool
- maturity: active
- function: benchmarking, networking, monitoring
- domain: networking, performance, developer-tools
- platform: windows, cross-platform, cli, go
- tags: network-measurement, iperf-alternative, tcp, udp, icmp, latency-testing, bandwidth-testing, load-testing, command-line, linux, macos, docker

## Member repositories
- microsoft/ethr (main) score 63

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:09:31.776984+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:51:37.085453+00:00, confidence not recorded.
  - readme: https://github.com/microsoft/ethr (fetched 2026-08-28T04:09:31.776984+00:00, sha 6f33482c969a)
- Data as of 2026-08-30T08:39:29.467469+00:00.