Julian Seward

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Julian Seward
Known forbzip2, valgrind

Julian Seward is a British compiler writer and Free Software contributor who lives in Stuttgart.[1] He is commonly known for creating the bzip2 compression tool in 1996, as well as the valgrind memory debugging toolset founded in 2000. In 2006, he won a second O'Reilly Open Source Award for his work on Valgrind.

Julian currently works at Mozilla.[2]


  • bzip2 (1996), a data compressor
  • cacheprof (1999), a tool for locating the sources of D-cache misses
  • Valgrind, a memory debugger


  • July 2006 – Julian Seward won a Google-O'Reilly Open Source Award for "Best Toolmaker" for his work on Valgrind


  1. ^ "Julian Seward". UK Companies House. Archived from the original on 3 April 2017.
  2. ^ Rob Sayre's Blog

External links[edit]