# How to measure execution time of entire jupyter notebook comprising of different cells in JULIA?
**URL:** https://discourse.julialang.org/t/how-to-measure-execution-time-of-entire-jupyter-notebook-comprising-of-different-cells-in-julia/68517
**Category:** General Usage
**Tags:** question, package
**Created:** [September 21, 2021, 9:48am UTC](https://discourse.julialang.org/t/how-to-measure-execution-time-of-entire-jupyter-notebook-comprising-of-different-cells-in-julia/68517 "2021-09-21T09:48:00Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@H\_Shrestha](https://discourse.julialang.org/u/H_Shrestha)
#### Post date: [September 21, 2021, 9:48am UTC](https://discourse.julialang.org/t/how-to-measure-execution-time-of-entire-jupyter-notebook-comprising-of-different-cells-in-julia/68517/1 "2021-09-21T09:48:00Z")
have a script written in JULIA language in Jupyter notebook. The script is divided into different cells. I’d like to calculate the execution time of not only a single line or cell, but the entire script comprising all the cells. In Python, I could do it using
```julia
> #In the beginning of script
> import time
> a = time.time()
> ...
> ...
> #At the end of script
> b= time.time()
> b - a
```
I’d like to have something similar to calculate the execution time of the entire script in JULIA. I tried using
```julia
@time begin
...
end
```
However, this works with a single line or cell only and does not seem to work when I put the statements in the beginning and end of the script if they are in different cells. How can I get the execution time of the entire script comprising all cells?
---
### Author:  [@nilshg](https://discourse.julialang.org/u/nilshg)
#### Post date: [September 21, 2021, 9:58am UTC](https://discourse.julialang.org/t/how-to-measure-execution-time-of-entire-jupyter-notebook-comprising-of-different-cells-in-julia/68517/2 "2021-09-21T09:58:04Z")
Just do the same thing you’d do in Python:
```julia
julia> using Dates
julia> t1 = now()
2021-09-21T10:57:35.616
julia> t2 = now()
2021-09-21T10:57:41.237
julia> t2 - t1
5621 milliseconds
```
---
### Author:  [@H\_Shrestha](https://discourse.julialang.org/u/H_Shrestha)
#### Post date: [September 21, 2021, 10:11am UTC](https://discourse.julialang.org/t/how-to-measure-execution-time-of-entire-jupyter-notebook-comprising-of-different-cells-in-julia/68517/3 "2021-09-21T10:11:32Z")
Thank you. I also found an alternative way using:
```julia
a = time()
#...
b = time()
println(b -a)
```
---
### Author:  [@nilshg](https://discourse.julialang.org/u/nilshg)
#### Post date: [September 21, 2021, 10:17am UTC](https://discourse.julialang.org/t/how-to-measure-execution-time-of-entire-jupyter-notebook-comprising-of-different-cells-in-julia/68517/4 "2021-09-21T10:17:20Z")
That works but you lose the nice formatting - given that `Dates` is a standard library there’s pretty much no overhead to using it, and it gives you nice formatting like
```julia
julia> t1 = now()
2021-09-21T11:16:11.382
julia> t2 =now() + Hour(1)
2021-09-21T12:16:20.421
julia> t2 - t1
3609039 milliseconds
julia> canonicalize(t2 - t1)
1 hour, 9 seconds, 39 milliseconds
```
---
### Author:  [@H\_Shrestha](https://discourse.julialang.org/u/H_Shrestha)
#### Post date: [September 21, 2021, 10:26am UTC](https://discourse.julialang.org/t/how-to-measure-execution-time-of-entire-jupyter-notebook-comprising-of-different-cells-in-julia/68517/5 "2021-09-21T10:26:54Z")
That’s good to know. Thank you!