| Name | Lines of code | Maintainability | Test coverage |
| libs/build_tools/assets_copier.js | 73 | A 40 mins | |
| libs/actions/render.js | 74 | A 2 hrs | |
| libs/ab_testing/ab_tester.js | 76 | A 55 mins | |
| libs/page_rendering/page_renderer.js | 91 | A 1 hr | |
| libs/flat_db/flat_helpers.js | 92 | B 4 hrs | |
| libs/juicebox/juice_diff.js | 95 | A 3 hrs | |
| libs/build_tools/pagelist_generator.js | 96 | C 1 day | |
| libs/juicebox/juice_helpers.js | 97 | B 4 hrs | |
| libs/enduro_server/enduro_server.js | 97 | A 2 hrs | |
| libs/admin_utilities/admin_security.js | 107 | A 2 hrs | |
| libs/flat_db/flat.js | 126 | A 1 hr | |
| libs/logger.js | 156 | A 3 hrs | |
| libs/build_tools/gulp_tasks.js | 166 | B 4 hrs | |
| libs/theme_manager/theme_manager.js | 209 | B 5 hrs | |
| libs/juicebox/juicebox.js | 256 | B 6 hrs | |
| scaffolding/test_performance/cms/admin_performance/500_textfields.js | 502 | A 0 mins |