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Alexia Massalin
Born
Henry Massalin

(1962-01-01)January 1, 1962
Nationality American
Citizenship United States
Alma mater Cooper Union School of Engineering, B.E. M.E., 1984
Columbia University, Ph.D., computer science, 1992
Known for Superoptimization
Scientific career
Fields Operating systems, optimizing compilers
Institutions MicroUnity Systems Engineering, Inc.
Thesis Synthesis: An Efficient Implementation of Fundamental Operating System Services (1992)
Doctoral advisor Calton Pu

Alexia Massalin (formerly Henry Massalin) is an American computer scientist and programmer. She is famous for creating a new idea called superoptimization. This is about finding the absolute best and fastest way to write computer code. She also designed something called the Synthesis kernel. This was a special, small operating system that could run Unix programs. It used a clever trick called self-modifying code to work super fast.

Life and Career

After finishing high school, Alexia Massalin received a scholarship. She went to the Cooper Union School of Engineering in Manhattan. There, she earned both her bachelor's and master's degrees. Later, in 1992, she completed her Ph.D. in computer science. She studied at Columbia University with professor Calton Pu.

In the 1980s, she worked for a company called Philon Inc. This New York startup focused on making programs that could write very efficient computer code. In October 1992, Massalin joined MicroUnity as a research scientist. At MicroUnity, she was in charge of parts of the software that handled signals and the overall design of computer programs.

The Synthesis Operating System

Massalin's first big invention happened while she was studying at Columbia. She created Synthesis, which was a special kind of operating system kernel. An operating system is the main software that makes your computer work. The kernel is its core part.

Synthesis was designed to manage computer resources. It also handled security and how the computer talked to its hardware. A key part of Synthesis was its ability to create new computer code while it was running. This helped to make the computer work much faster. This idea of optimizing code using information gathered while the program was running was very new. People thought it would be too hard to do.

To help Synthesis work, Massalin also invented special data structures. She called these Quajects. These Quajects were unique because they held both data and instructions for the computer.

Alexia Massalin continues to work on advanced microprocessors today.

Personal Life

Alexia Massalin's parents were refugees from Trieste, a city near Croatia. In the 1940s, they moved to Astoria, Queens, in New York. Her father worked in construction there.

In 1996, a magazine called Wired published an article about her. The author, Gary Andrew Poole, wrote that she "could be the Einstein of our time." She was also known for giving "piggyback rides" to people she met. These people included famous computer scientists like Dennis Ritchie, Ken Thompson, and artificial intelligence pioneer Marvin Minsky.

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