feat: use gzip compression for decide

[frankh]

Changes

for some reason we use base64 "compression" (it's not) for /decide requests. I'm not sure why as we support gzip will be much more efficient (atm our /decide requests on us.posthog.com are around 4kB, it will likely be <1kB gzipped)

Checklist

• Tests for new code (see advice on the tests we use)
• Accounted for the impact of any changes across different browsers
• Accounted for backwards compatibility of any changes (no breaking changes in posthog-js!)

[vercel]

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Name	Status	Preview	Updated (UTC)
posthog-js	✅ Ready (Inspect)	Visit Preview	Aug 13, 2024 0:51am

[github-actions]

Size Change: 0 B

Total Size: 1.17 MB

ℹ️ View Unchanged

Filename	Size
dist/array.full.js	333 kB
dist/array.js	154 kB
dist/exception-autocapture.js	10.4 kB
dist/main.js	155 kB
dist/module.js	154 kB
dist/recorder-v2.js	110 kB
dist/recorder.js	110 kB
dist/surveys-preview.js	59.8 kB
dist/surveys.js	66 kB
dist/tracing-headers.js	8.26 kB
dist/web-vitals.js	5.79 kB

_{compressed-size-action}

[posthog-bot]

This PR hasn't seen activity in a week! Should it be merged, closed, or further worked on? If you want to keep it open, post a comment or remove the stale label – otherwise this will be closed in another week.

[neilkakkar]

reasonable 👍

[posthog-bot]

This PR hasn't seen activity in a week! Should it be merged, closed, or further worked on? If you want to keep it open, post a comment or remove the stale label – otherwise this will be closed in another week.

[posthog-bot]

This PR was closed due to lack of activity. Feel free to reopen if it's still relevant.