关键词: Julia语言,计算规模,并行程序,程序精化,性能分析

Abstract: Julia language is a free developing scripting language under the MIT license.Its goal is to ease the difficulty of parallel programming.Based on the language mechanisms of Julia,we constructed a use case of computing the average running-time between every two bus stops.And then,we exampled the Julia programming framework and the code refining steps.Julia language supports both multi-cores/CPUs parallel programming modes.To full use all the computing resources,we developed some experiments on new policies about how to improve the computing performance.Experiments show that managing processors in parallel computing model consume working time,but with the increasing of problem size,this impact can be gradually ignored,and gaining nearly linear speedup.

Key words: Julia language,Computing scale,Parallel program,Program optimization,Performance analysis