close all
clear
clc

A=[eps eps -1;eps -eps eps;-1 eps eps];
b=[-1;0;1];

x1=inv(A)*b;
x1_1=A\b;

A2=randn(100);
b2=randn(100,1);

tic;
for i=1:1:100
    x2=inv(A2)*b2;
end
AverageTime1=toc/100;

tic;
for i=1:1:100
    x2_1=A\b;
end
AverageTime2=toc/100;

AverageTime1/AverageTime2