STREAM

6.5easy start · #20 of 65
in PC Benchmark Software

Free to practise onnot on record
Free trialnot on record
Well documentedyes
Runs where you workyes

Runs on Linux, Mac, Windows.

Visit site Alternatives

STREAM is ranked #20 of 65 in PC benchmark software on The Geeks Club. It runs on Linux, macOS, Windows.

Compared on PC benchmark software

Free plan: Yes
Workload areas: memory bandwidth; vector-kernel computation rate; COPY; SCALE; ADD; TRIAD
Operating systems: Linux; Windows; DOS; Power Mac
Comparison database: Yes
Result export formats: comma-delimited raw data files
Custom test profiles: Yes
CLI or automation: Yes

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The record

Purpose: STREAM is a synthetic benchmark that measures sustainable memory bandwidth and computation rates for simple vector kernels.
Intended use: It is designed to use datasets much larger than available cache, to make results more indicative of large vector style applications.
Kernels: The benchmark repeats four kernels: Copy, Scale, Add, and Triad.
Source languages: The maker recommends compiling the source code, which is available in C or Fortran.
Parallel runs: The standard C and Fortran code includes OpenMP directives, and an MPI version is available for cluster runs.
Published results: Results labeled as standard STREAM benchmark results must conform to the STREAM Run Rules; modified or nonconforming runs must be clearly labeled.
Use and redistribution: The run rules permit use and redistribution, and permit modification for personal use including commercial use, subject to publication restrictions.
Warranty: The run rules state that no warranty is expressed or implied.
Results database: The site publishes benchmark results in tables covering bandwidth, machine balance, and equivalent MFLOPS.
Standards: The standard results set uses C or Fortran versions with 64-bit data types on production hardware and excludes simulated results and significantly modified code.
Tuned results: The tuned results set allows code modifications, including assembly language, while requiring 64-bit data types on production hardware.
Windows and Linux binaries: The FAQ lists precompiled binaries for Windows and Linux but describes the available binaries as obsolete and recommends compiling the source.
Maintainer: The FAQ identifies John McCalpin as STREAM's creator and maintainer.
Project hosting: The site says STREAM is hosted at the University of Virginia in Charlottesville, Virginia.

Where it ranks on The Geeks Club

Best PC Benchmark Software in 2026#20 of 65

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Sources

cs.virginia.edu/stream/ref.html· checked 5 Oct 2026
cs.virginia.edu/stream/· checked 5 Oct 2026