Re: [pgAdmin][RM4701] Webpack optimization

On Wed, Sep 18, 2019 at 2:26 PM Aditya Toshniwal <
aditya(dot)toshniwal(at)enterprisedb(dot)com> wrote:

> Hi Hackers,
>
> Attached is the patch to optimise webpack bundled files for improving
> performance.
> @Ashesh Vashi <ashesh(dot)vashi(at)enterprisedb(dot)com> Thank you for your
> suggestions and inputs.
>
> Changes include:
> 1) Remove underscore-string and sprintf-js packages as we were using only
> %s. Instead, added a function to do the same. Also changed gettext to
> behave like sprintf directly.
> 2) backgrid.sizeable.columns was not used anywhere, removed.
> @babel/polyfill is deprecated, replaced it with core-js.
> 3) Moved few css to make sure they get minified and bundled.
> 4) Added Flask-Compress to send static files as compressed gzip. This will
> reduce network traffic and improve initial load time for pgAdmin.
> 5) Split few JS files to make code reusable.
> 6) Lazy load few modules like leaflet, wkx is required only if geometry
> viewer is opened. snapsvg loaded only when explain plan is executed. This
> will improve sqleditor initial opening time.
>
Move svgsnap, and its dependencies completely in separate module, and load
them only when required (lazy loading).
Similarly - leaflet should be in a separate module, as not many user will
use the Geometry Viewer.

-- Thanks, Ashesh

>
> Below is the size and files difference after and before the changes:
> [image: Screenshot 2019-09-18 at 14.13.02.png][image: Screenshot
> 2019-09-18 at 14.04.41.png]
> Below is the lighthouse (Chrome extension) report after and before the
> changes:
> [image: Screenshot 2019-09-18 at 13.53.10.png] [image: Screenshot
> 2019-09-18 at 14.08.20.png]
>
> Do not forget to do a yarn install and a pip install
> Kindly review.
>
> --
> Thanks and Regards,
> Aditya Toshniwal
> Software Engineer | EnterpriseDB India | Pune
> "Don't Complain about Heat, Plant a TREE"
>