Lanbench

LANBench is a free, portable network benchmarking utility designed to test the performance of a local area network (LAN). It specifically measures TCP performance between two computers using the Winsock 2.2 API. Key Features

Low Resource Usage: Uses the Windows I/O completion port for efficient multi-threading with negligible CPU impact. LANBench

Simultaneous Connections: Users can simulate network load by opening up to 20 multiple simultaneous connections during a single test run. LANBench is a free, portable network benchmarking utility

Adjust settings such as Packet Size (e.g., 2048 KB or 4096 KB) and Duration (e.g., 10–20 seconds). Execute the Test: Raw logs: per-packet or per-interval counters

LANBench is a minimalist network benchmarking utility created by Zach Saw. Unlike complex, enterprise-grade tools that require command-line expertise, LANBench offers a straightforward graphical user interface (GUI) geared toward measuring the maximum TCP throughput between two Windows computers on a Local Area Network (LAN).

Client Mode: Set the second computer to "Client" and enter the IP address of the server computer.

Output and reporting

• Raw logs: per-packet or per-interval counters.
• Aggregated metrics: average, min, max, and percentiles.
• Visualizations: throughput over time, latency histograms, packet loss timelines.
• Export: CSV/JSON for post-processing; PDF for stakeholder reports.