# Speed Up Oh-My-Zsh

Oh-my-zsh is becoming unbearably slow…

Here are some approaches to speed up it.

### Intro

I’m not a computer science expert, so I always choose to bear with the small issues happing on my laptop. My personal as well as working laptops are all Mac. And I use iTerm2 and Oh-My-Zsh to replace the default Terminal. For the zsh theme, I recommend mrtazz.

One of the costs of using Oh-my-zsh is that the startup times are slow. That’s what everyone says.

But recently, I am getting more and more frustrated by the slow startup times. By searching online, I found this tutorial really helpful.

The following are the steps I took to improve my oh-my-zsh experience:

### Step 1: Benchmarking Current Performance

Let’s measure how long it takes to start a new shell session:

5.5 seconds??? That is not good at all.

### Step 2: Check What Slows It Down

Now, please pay attention. Run the following command in your Terminal, and take note of the portion where the output pauses a bit.

For my case, I found the portion for setting hadoop & hive parameters, and also for setting up nvm tend to get stuck for a while.

### Step 3: Remove the Unnecessary Parts

As I don’t need hadoop and nvm that often, I decided to prevent them from auto-loading during starting up zsh.

So I made the following changes in my ~/.zshrc file:

• Comment out the Hadoop Hive exports commands
• Comment out the nvm loading command. Instead, create an alias for it so that I can easily load it when I need it.

### The End

That’s all~ Now let’s quite the Terminal and reopen it.
Test the time again:

Yeah.