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[Cache] Don't clone, serialize #17654

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Merged
merged 1 commit into from
Feb 3, 2016

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nicolas-grekas
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Q A
Bug fix? no
New feature? yes
BC breaks? no
Deprecations? no
Tests pass? yes
Fixed tickets -
License MIT
Doc PR -

Cloning is not required by PSR-6, adds overhead and doesn't prevent any mistake for nested objects. Let's simplify.
ArrayCache in turn should store serialized by default, so that data is deep-cloned. But since this can cause a perf issue for some, I propose to add a constructor flag to disable serializing. WDYT?

@stof
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stof commented Feb 2, 2016

@nicolas-grekas it would be great to look at fixing deps=high jobs (in all affected branches).

This PR looks good to me. The constructor flag allows a performance increase when storing only immutable values (scalars are immutable, references are mutable, arrays are immutable when they contain only immutable values, and objects depend on the class).
I suggest documenting the limitation of disabling serialization though (storing mutable values in such case can lead to a cache corruption)

@nicolas-grekas
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@stof comment added. For the failures, I looked quickly but I'm not familiar enough with the related code. Could someone else have a look at them?

@nicolas-grekas nicolas-grekas force-pushed the ser-cache branch 3 times, most recently from f524aa3 to 089db2d Compare February 3, 2016 08:32
@nicolas-grekas nicolas-grekas merged commit 8605417 into symfony:master Feb 3, 2016
nicolas-grekas added a commit that referenced this pull request Feb 3, 2016
This PR was merged into the 3.1-dev branch.

Discussion
----------

[Cache] Don't clone, serialize

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

Cloning is not required by PSR-6, adds overhead and doesn't prevent any mistake for nested objects. Let's simplify.
ArrayCache in turn should store serialized by default, so that data is deep-cloned. But since this can cause a perf issue for some, I propose to add a constructor flag to disable serializing. WDYT?

Commits
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8605417 [Cache] Don't clone, serialize
@nicolas-grekas nicolas-grekas deleted the ser-cache branch February 3, 2016 08:39
@fabpot fabpot mentioned this pull request May 13, 2016
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