# cmake --job
**URL:** https://discourse.cmake.org/t/cmake-job/5081
**Category:** Usage
**Tags:** os:windows
**Created:** [February 22, 2022, 4:03am UTC](https://discourse.cmake.org/t/cmake-job/5081 "2022-02-22T04:03:17Z")
**Posts on this page:** 7
**Page:** 1
### Author:  [@alice](https://discourse.cmake.org/u/alice)
#### Post date: [February 22, 2022, 4:03am UTC](https://discourse.cmake.org/t/cmake-job/5081/1 "2022-02-22T04:03:17Z")
cmake --help
I cant find --job information.
Here is the command and I want to speed up the build and install.
How can I add some parameter for the command to speed up?
```auto
cmake -B build/ -D CMAKE_BUILD_TYPE=Release
cmake --build build/ --config Release
cmake --install build/ --config Release --prefix C:/release/
```
---
### Author:  [@ben.boeckel](https://discourse.cmake.org/u/ben.boeckel)
#### Post date: [February 22, 2022, 11:45am UTC](https://discourse.cmake.org/t/cmake-job/5081/2 "2022-02-22T11:45:27Z")
There is the `--parallel` (or `-j`) flag you can use with `--build` or `--install`.
---
### Author:  [@McMartin](https://discourse.cmake.org/u/McMartin)
#### Post date: [February 22, 2022, 11:53am UTC](https://discourse.cmake.org/t/cmake-job/5081/3 "2022-02-22T11:53:21Z")
The documentation is here: [https://cmake.org/cmake/help/latest/manual/cmake.1.html#build-a-project](https://cmake.org/cmake/help/latest/manual/cmake.1.html#build-a-project)
---
### Author:  [@alice](https://discourse.cmake.org/u/alice)
#### Post date: [February 23, 2022, 2:43am UTC](https://discourse.cmake.org/t/cmake-job/5081/4 "2022-02-23T02:43:16Z")
> [@ben.boeckel](#):
>
> you can use with `--build` or `--install`.
Can I use both of them (build and install) ?
```auto
cmake -B build/ -D CMAKE_BUILD_TYPE=Release
cmake --build build/ --config Release -j12
cmake --install build/ --config Release --prefix C:/release/ -j12
```
---
### Author:  [@ben.boeckel](https://discourse.cmake.org/u/ben.boeckel)
#### Post date: [February 23, 2022, 3:32pm UTC](https://discourse.cmake.org/t/cmake-job/5081/5 "2022-02-23T15:32:41Z")
Yes, that is fine.
---
### Author:  [@alice](https://discourse.cmake.org/u/alice)
#### Post date: [February 24, 2022, 4:37am UTC](https://discourse.cmake.org/t/cmake-job/5081/6 "2022-02-24T04:37:00Z")
Does the cmake automatically detect job number and use it without command `-j` ?
For example,
My PC has 4 job. The command will automatically build with 4 job. So I don’t need to use `-j 4`
```auto
cmake -B build/ -D CMAKE_BUILD_TYPE=Release
cmake --build build/ --config Release
cmake --install build/ --config Release --prefix C:/release/
```
cmake --help
```auto
Build in parallel using the given number of jobs.
If is omitted the native build tool's
default number is used.
The CMAKE_BUILD_PARALLEL_LEVEL environment variable
specifies a default parallel level when this option
is not given
```
---
### Author:  [@ben.boeckel](https://discourse.cmake.org/u/ben.boeckel)
#### Post date: [February 24, 2022, 3:28pm UTC](https://discourse.cmake.org/t/cmake-job/5081/7 "2022-02-24T15:28:40Z")
> [@alice](#):
>
> Does the cmake automatically detect job number and use it without command `-j` ?
No. It does the default of the generator. For Ninja generators, this is to be parallel (I think `ncores + 2` is the heuristic). VS has some weird internal logic, but the rest are not parallel without it being explicit.