Large projects have lots of scripts and take few minutes or even dozens of minutes to build. Mine takes 4-5 minutes for every compile time. It's really inconvenience when implement UI, change spacing or colors. I have to change that.

Online Instructions

I followed some instructions to speed it up. You can find it with ease.

Reduce not important scripts

Open your Build Phrase and check your scripts. I had 4 running scripts, generating GraphQL API, 2 Pods related scripts, Sentry scripts (upload .dSYM).

I notice generating GraphQL API and Sentry scripts here. Why do you need it run everytime we compile?

Get rid of GraphQL script

How often do we change GraphQL schemas?
Only when implement new features.

This is where I started.
Remove GraphQL script and add it into a bash script file. Run script when you need to recompile schema. Here is my script:

# (1)
apollo schema:download --endpoint=server_endpoint path_to_schema_file/schema.json
# (2)
SCHEMA_PATH=$PWD"/project_name"
# (3)
$PWD/Pods/Apollo/scripts/run-bundled-codegen.sh codegen:generate --target=swift --includes='./**/*.graphql' --localSchemaFile="$SCHEMA_PATH/Services/GraphQL/schema.json" $SCHEMA_PATH/Services/GraphQL/API.swift

(1): Download latest schema from your server. server_endpoint is your server path. Usually it's like this https://api.company_name.com/graphql

(2): $PWD: get your current directory and point it to your project

(3): Now generate file. Please make sure you change $SCHEMA_PATH/Services/GraphQL/schema.json and $SCHEMA_PATH/Services/GraphQL/API.swift to yours.

Notes:
You have to run chmod u+r+x downloadSchema.sh at the first time run the bash file.
Then run, ./downloadSchema.sh.

Later, just run download script.
That's it. I save minutes with this.

Remove uploading script

How often do we need to upload .dSYM?
Only when release new version

Ask yourself, do you really want to do this? Some extra work is needed when release to upload .dSYM to Sentry (crashed report service I used). But for me, it's worth to do.

Some extra work:

• Release
• Download dSYM from AppstoreConnect when finish processing
• Upload manually

If it doesn't matter with you, please try this script.
sentry-cli upload-dif --org company_name --project project_name --log-level=debug appDsyms.zip

I added it into my .zshrcas an alias, so after download, just run alias and done.

Conclusion

This is my experience, maybe it doesn't work in your project. Please feel free to discuss below.

Enjoy coding.