MATLAB Programming Fundamentals - MathWorks

Script-Based Performance Test Function-Based Performance Test

vectorSize = 1e7;

%% Ones Function

x = ones(1,vectorSize);

%% Indexing With Variable

id = 1:vectorSize;

x(id) = 1;

%% Indexing On LHS

x(1:vectorSize) = 1;

%% For Loop

for i=1:vectorSize

x(i) = 1;

end

function tests = preallocationTest

tests = functiontests(localfunctions);

end

function testOnes(testCase)

vectorSize = getSize();

x = ones(1,vectorSize());

end

function testIndexingWithVariable(testCase)

vectorSize = getSize();

id = 1:vectorSize;

x(id) = 1;

end

function testIndexingOnLHS(testCase)

vectorSize = getSize();

x(1:vectorSize) = 1;

end

function testForLoop(testCase)

vectorSize = getSize();

for i=1:vectorSize

x(i) = 1;

end

end

function vectorSize = getSize()

vectorSize = 1e7;

end

Run Performance Test

Run the performance test using runperf.

results = runperf('preallocationTest.m')

Running preallocationTest

.......... .......... .......... ..

Done preallocationTest

__________

results =

33 Unit Testing