_isScopePrivate vs ESI hole punching vs private data

[onlinebizsoft]

Summary (*)

Related to
#31754
https://support.magento.com/hc/en-us/articles/360040208612--isScopePrivate-in-private-content-blocks-slows-Magento-performance
https://devdocs.magento.com/guides/v2.3/extension-dev-guide/cache/page-caching/private-content.html

_isScopePrivate couldn't be replaced by "private content" completely

Examples (*)

When you have a small block for announcement which appears on every page of the website, it has no interaction with user action (different from users action like adding to cart,....). The block may have content changed often but you wont want to flush whole cache to get it updated to every user. In this case you really want to use _isScopePrivate or ESI hole punching (depends on developer choice). It can't be done or replaced by "private content"

Proposed solution

So I don't understand why you are going to remove _isScopePrivate in future? We should keep the feature as it is and you just need to change to "private content" for necessary user cases.

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[m2-assistant]

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[onlinebizsoft]

@mrtuvn @sivaschenko @ihor-sviziev

[mrtuvn]

Actually it's only note deprecated and nothing removed in code base. You still can use private scope variable. But i think we should update docs content for clarify lack of information new cache approach.
New approach for private content is like product compare functional (section ajax update)
https://github.com/magento/magento2/blob/2.4-develop/app/code/Magento/Catalog/etc/frontend/sections.xml#L11
Some other cases we can set cache_lifetime (via xml or php block) to false for dynamic block content
https://github.com/magento/magento2/blob/2.4-develop/app/code/Magento/Swatches/view/frontend/layout/wishlist_index_configure_type_configurable.xml#L18
Or wrap Esi (varnish) with ttl define
https://github.com/magento/magento2/blob/2.4-develop/app/code/Magento/Theme/view/frontend/layout/default.xml#L76
cc: @Vinai Maybe he will have more details on this area
Current magento still used old way (scopePrivate) in some other places example Checkout Blocks
New functional while developments i rarely use scopePrivate and definitely avoid cacheables false in some cases

[onlinebizsoft]

@mrtuvn you refer to product compare but it is not same, it could be done with "private data" because an user action "add to compare" can trigger an invalidation,....
However the private scope variable is helpful when we want a small non-cacheable block on all pages

[Vinai]

The main benefit from my point of view is that private scope blocks make migrating blocks from Magento 1 to Magento 2 very easy.
It would be cool if the deprecation note from the docs would be removed.

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[engcom-Delta]

Hi @mrtuvn ,

Thank you for raising an issue , we are happy to work on this issue . Kindly provide steps to reproduce , actual results with screenshots.

Regards,

[engcom-Delta]

We have noticed that this issue has not been updated for a period of more than 14 Days.
Hence we assume that this issue is fixed now, so we are closing it. Please raise a fresh ticket or reopen this ticket if you need more assistance on this.

[Vinai]

lol