Reduce package size

[mishushakov]

We're only using co2.js for calculating emissions, thus don't need the full 430 kB package
Would be amazing if you could split the database and the calculator into separate sub-packages

[fershad]

This is an interesting point, something that we should consider looking into. The database is used by the greencheck hosting API in the library so isn't needed for emissions calculations. It looks like the database is used for testing (very quick assessment), so might be safe to exclude from the package.

There's a bunch of extra stuff in the data folder that also gets packaged at the moment which are probably surplus to requirements as well.

@mishushakov are you able to tree-shake out the stuff you don't need, or is that not an option in your use case?

[mishushakov]

I'm not using it for frontend, so that's not an option currently

[fershad]

Reduced package size a bit by removing debug dependency in #144. Will keep looking for opportunities to shave off some more bytes.

[EvanHahn]

It looks like some files are published in the npm package that don't need to be. I ran npm pack --dry-run and got 74 results:

74 files (click to expand)

870B    .all-contributorsrc
225B    .esbuild.browser.js
941B    .esbuild.esm.js
376B    .esbuild.node.js
8B      .eslintignore
183B    .gitpod.yml
6.2kB   CHANGELOG.md
12.0kB  LICENSE
562B    NOTICE
6.1kB   README.md
3.6kB   data/output/average-intensities.js
32.4kB  data/output/average-intensities.json
3.4kB   data/output/marginal-intensities-2021.js
104.6kB data/output/marginal-intensities-2021.json
1.9kB   dist/cjs/1byte.js
3.4kB   dist/cjs/1byte.js.map
9.0kB   dist/cjs/co2.js
15.3kB  dist/cjs/co2.js.map
1.0kB   dist/cjs/constants/file-size.js
306B    dist/cjs/constants/file-size.js.map
2.4kB   dist/cjs/constants/index.js
1.8kB   dist/cjs/constants/index.js.map
4.7kB   dist/cjs/data/average-intensities.min.js
6.1kB   dist/cjs/data/average-intensities.min.js.map
4.6kB   dist/cjs/data/marginal-intensities-2021.min.js
6.5kB   dist/cjs/data/marginal-intensities-2021.min.js.map
7.7kB   dist/cjs/helpers/index.js
9.9kB   dist/cjs/helpers/index.js.map
2.0kB   dist/cjs/hosting-api.js
2.8kB   dist/cjs/hosting-api.js.map
2.6kB   dist/cjs/hosting-json.node.js
4.7kB   dist/cjs/hosting-json.node.js.map
3.0kB   dist/cjs/hosting-node.js
4.6kB   dist/cjs/hosting-node.js.map
1.5kB   dist/cjs/hosting.js
706B    dist/cjs/hosting.js.map
1.8kB   dist/cjs/index-node.js
514B    dist/cjs/index-node.js.map
2.0kB   dist/cjs/index.js
629B    dist/cjs/index.js.map
27B     dist/cjs/package.json
7.6kB   dist/cjs/sustainable-web-design.js
14.6kB  dist/cjs/sustainable-web-design.js.map
1.0kB   dist/esm/1byte.js
7.5kB   dist/esm/co2.js
117B    dist/esm/constants/file-size.js
797B    dist/esm/constants/index.js
3.7kB   dist/esm/data/average-intensities.min.js
3.5kB   dist/esm/data/marginal-intensities-2021.min.js
6.7kB   dist/esm/helpers/index.js
1.1kB   dist/esm/hosting-api.js
195B    dist/esm/hosting.js
372B    dist/esm/index.js
25B     dist/esm/package.json
7.3kB   dist/esm/sustainable-web-design.js
16.0kB  dist/iife/index.js
57.6kB  dist/iife/index.js.map
365B    fixup
29B     index.d.ts
2.3kB   package.json
2.6kB   src/1byte.js
10.9kB  src/co2.js
70B     src/constants/file-size.js
1.3kB   src/constants/index.js
3.1kB   src/data/average-intensities.min.js
3.0kB   src/data/marginal-intensities-2021.min.js
6.8kB   src/helpers/index.js
1.9kB   src/hosting-api.js
3.2kB   src/hosting-json.node.js
3.3kB   src/hosting-node.js
431B    src/hosting.js
270B    src/index-node.js
336B    src/index.js
10.8kB  src/sustainable-web-design.js

Many of these are needed but I'm sure some can be removed.

You could add them to .npmignore. I'm happy to help but I don't know which files are necessary.

(Alternatively if you want to switch from npmignore's blocklist style to an allowlist style, you can use the files key in package.json.)

[fershad]

Looking at this again, there's probably a few changes we can make to reduce package size:

• We probably don't need to ship the IIFE version of the library. We've published details on how to build the library to generate that file if desired. That said we could also possibly commit that output to git so anyone can access it through this repo.
• We don't need to be shipping the source files (src/*).
• There's a bunch of dot files that don't need to be published.
• We don't need to publish the grid intensity data files at dist/data.

Alternately, we should:

• Probably publish .map files for ESM files

Guesstimating a reduction of about 200kB if we do this.

[fershad]

@mishushakov I'm closing this issue since release v0.14.1 is now published (unpacked size now 194 kB on NPM).