Mobile performance and PSI score

[osa911]

Hi,
I have worked on migrating my current project on mui5 with JSS to TSS.
The latest version of TSS (v3) was not correctly working with NextJS+SSR and MUI cache and I decided to use version 4 beta3 which works fine in this case.
After the main work on migration was done I compared the PSI score from lighthouse and pagespeed.web.dev before migration and after.
And as a result for desktop, it was approximately the same but for mobile devices, it has down (45 -> 26)
Maybe somebody did the same work or knows why it happened - please explain to me.
I'm thinking to go back to JSS temporarily...

[garronej]

I think I found what is the issue.
Can you confirm that the performance issue is resolve in 4.0.0-beta.4 ?

[osa911]

I was busy this day, back to you once check it on production
Btw, Thanks for your work!

EDITED: 4.0.0-beta.4 is still not available for load

[garronej]

Sorry @osa911,
There was a problem with my CI workflow. 4.0.0-beta.4 is now available on NPM

[osa911]

I've compared the impact of v4.beta4 in the lighthouse with v4.beta3 - it gives up to 5 points on average.
Probably the main issue in another place...
I have no idea right now

[garronej]

Hi @osa911,
Could you try with 4.0.0-beta.7?

[osa911]

Let me try it 😉 чт, 18 серп. 2022 р. о 17:38 Joseph Garrone ***@***.***> пише:

…

Hi @osa911 <https://github.com/osa911>, Could you try with 4.0.0-beta.7? — Reply to this email directly, view it on GitHub <#102 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ADMB4ER3SAWRCM3GMMJ3TYLVZZKH5ANCNFSM56SKW5XQ> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[garronej]

Ok, thank you for reporting.
Could you check with 4.0.0-beta.8 ?

Thank you in advance,

[osa911]

I'll let you know

[osa911]

In synthetic tests, it looks the same maybe +1 point for mobile.
The main thing is not worse! Let me check it on production

[osa911]

On Production env, it works fine as well and has a good score as the version before

[garronej]

Thanks for the feedback.
I'll try to benchmark and improve along the way.