How Fast Bun Installs Packages ?

To see how fast bun installs packages compared to nodejs, I created a small project that has only 5 dependencies.

I will use the code below to measure how much time is spend installing the packages in milliseconds

echo $(($(date +%s%N)/1000000))
npm i
echo $(($(date +%s%N)/1000000))

npm

1675297466099 - 1675297464841 = 1258. There is a 1258 milliseconds difference so that's 1.25 seconds.

Let's try it now with bun

echo $(($(date +%s%N)/1000000))
bun i
echo $(($(date +%s%N)/1000000))

npm 1675297678954 - 1675297678910 = 44. There is only 44 milliseconds difference and 3ms of that is because of the timestamp command.

1258/44 = 28.59. Bun was 28.5 times faster.

But that's just for 5 dependencies, what if I had 100 dependencies ?

Trying with more dependencies

Let's see. I installed most 100 depended packages from here to my demo project and we will compare the time again.

1675299832241 - 1675299655932=176309 = 176,309 seconds = 2.93 minutes.

1675299944684 - 1675299939218 = 5.4 seconds...

This time bun was 35 times faster

So bun can be even faster when it comes to installing packages for bigger projects.