Scalability & Performance

Scalability requirements

• The client needs to be responsive with up to 300 sources.
• The client needs to be responsive with up to 100 submissions and replies per source.

Benchmarking

• Loading the source list (breakdown): https://github.com/freedomofpress/securedrop-client/issues/1009#issuecomment-606167102
• Loading a conversation: https://github.com/freedomofpress/securedrop-client/pull/1049#issuecomment-651402561

Configuration

To create many sources:

1. On your test server, sudo -u www-data bash
2. cd /var/www/securedrop
3. NUM_SOURCES=500 ./create-dev-data.py

Or...

1. On your test server, sudo -u www-data bash
2. cd /var/www/securedrop
3. ./qa_loader.py --journalist-count 1 --source-count 500 --submissions-per-source 2 --replies-per-source 2 --source-reply-fraction 1

To create one source with many messages and replies:

1. On your test server, sudo -u www-data bash
2. cd /var/www/securedrop
3. ./qa_loader.py --journalist-count 1 --source-count 1 --submissions-per-source 500 --replies-per-source 500 --source-reply-fraction 1

Tips for improving performance

• In Qt you can use QTimer to schedule slices of work