Directory.gov.au is the Australian Government Directory, which lists government organisations, boards and the people in them. The project upgraded it from Drupal 7 to Drupal 9.
Moving from Drupal 7 to Drupal 9 is closer to a rebuild than an upgrade. The custom modules had to be rewritten, the theme refactored, and 10,000+ content items moved across without losing data integrity.
I rewrote the custom modules for Drupal 9, moved the content across with migration scripts built on the Migrate API, and refactored the theme with modern CSS.
Directory.gov.au moved off Drupal 7 onto Drupal 9, with all 10,000+ content items carried across and their data intact. Page loads on large directory queries came down to about 100 ms.
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