williaster commented on issue #4727: [webpack] setup lazy loading for all visualizations URL: https://github.com/apache/incubator-superset/pull/4727#issuecomment-395911509 These are the final set of 3x empirical tests per example dashboard before and after, on non-minimized code with hard refresh/no caching. They look **even better** than above! - average total payload **decreased by 10.1 MB** (-71% change) - DOM content load time **decreased 8.7s** (-78% change) - Page total load time **decreased 7.9s** (-48% change) - the average # requests **increased by 30** @mistercrunch shall we merge this? 🚀  | Total payload (MB) |  |  -- | -- | -- | -- Dashboard | Before | After |  Delta Births example | 12.5 | 2.2 | **-10.3 MB** World data example | 12.5 | 2.6 | **-9.9 MB** Misc charts example | 14.6 | 4.3 | **-10.3 MB** Deck gl | 17.2 | 7.4 | **-9.8 MB**  | DOM content loaded (seconds) |  |  -- | -- | -- | -- Dashboard | Before | After | Delta Births example | 11.52 | 2.28 | **-9.24 s** World data example | 10.77 | 2.73 | **-8.04 s** Misc charts example | 10.59 | 2.54 | **-8.05 s** Deck gl | 11.69 | 2.17 | **-9.5 s**  | Total time [all requests incl async] (sec) |  |  -- | -- | -- | -- Dashboard | Before | After | Delta Births example | 16.63 | 7.96 | **-8.67 s** World data example | 13.17 | 6.76 | **-6.41 s** Misc charts example | 17.58 | 10.78 | **-6.80 s** Misc charts example w Deck gl | 18.43 | 8.85 | **-9.58 s**  | Requests (count) |  |  -- | -- | -- | -- Dashboard | Before | After | Delta Births example | 32 | 63 | +31 World data example | 29 | 71 | +42 Misc charts example | 46 | 74 | +28 Deck gl (high bc of map tiles) | 196 | 217 | +21
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