Statically cache the String value of g_internal_field for a small performance gain #4863
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tomduncalf
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RedBeard0531
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src/jsi/jsi_class.hpp
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| @@ -490,7 +490,9 @@ class ObjectWrap { | |||
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| static Internal* get_internal(JsiEnv env, const JsiObj& object) | |||
| { | |||
| auto internal = object->getProperty(env, g_internal_field); | |||
| static const auto js_internal_field = fbjsi::String::createFromAscii(env, g_internal_field); | |||
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This will break on reload since it will continue to use the string from the old env.
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Ah right yeah, good point. I guess there's no way round that? It's not a huge gain anyway so I'm happy to close this if that's best
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Make it a class-static like s_ctor with the same logic to set it on module load and reset on em teardown. This isnt a perfect solution because it assumes at most one env at a time, but it will at least work as well as the rest of the codebase.
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Updated in e32fc5b
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Waiting on #4869 for lint to pass |
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kraenhansen
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RedBeard0531
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Co-authored-by: Mathias Stearn <[email protected]>
Co-authored-by: Mathias Stearn <[email protected]>
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Ignoring known failure on Android |
kraenhansen
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…formance gain (#4863) * Statically cache the String value of g_internal_field for a small performance gain * Fix lint * Update src/jsi/jsi_class.hpp Co-authored-by: Mathias Stearn <[email protected]> * Update src/jsi/jsi_class.hpp Co-authored-by: Mathias Stearn <[email protected]> * Change to empty string for internal field name Co-authored-by: Mathias Stearn <[email protected]>
kraenhansen
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Sep 9, 2022
…formance gain (#4863) * Statically cache the String value of g_internal_field for a small performance gain * Fix lint * Update src/jsi/jsi_class.hpp Co-authored-by: Mathias Stearn <[email protected]> * Update src/jsi/jsi_class.hpp Co-authored-by: Mathias Stearn <[email protected]> * Change to empty string for internal field name Co-authored-by: Mathias Stearn <[email protected]>
kraenhansen
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Sep 9, 2022
…formance gain (#4863) * Statically cache the String value of g_internal_field for a small performance gain * Fix lint * Update src/jsi/jsi_class.hpp Co-authored-by: Mathias Stearn <[email protected]> * Update src/jsi/jsi_class.hpp Co-authored-by: Mathias Stearn <[email protected]> * Change to empty string for internal field name Co-authored-by: Mathias Stearn <[email protected]>
kraenhansen
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Sep 13, 2022
…formance gain (#4863) * Statically cache the String value of g_internal_field for a small performance gain * Fix lint * Update src/jsi/jsi_class.hpp Co-authored-by: Mathias Stearn <[email protected]> * Update src/jsi/jsi_class.hpp Co-authored-by: Mathias Stearn <[email protected]> * Change to empty string for internal field name Co-authored-by: Mathias Stearn <[email protected]>
kraenhansen
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Sep 15, 2022
…formance gain (#4863) * Statically cache the String value of g_internal_field for a small performance gain * Fix lint * Update src/jsi/jsi_class.hpp Co-authored-by: Mathias Stearn <[email protected]> * Update src/jsi/jsi_class.hpp Co-authored-by: Mathias Stearn <[email protected]> * Change to empty string for internal field name Co-authored-by: Mathias Stearn <[email protected]>
takameyer
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…formance gain (#4863) * Statically cache the String value of g_internal_field for a small performance gain * Fix lint * Update src/jsi/jsi_class.hpp Co-authored-by: Mathias Stearn <[email protected]> * Update src/jsi/jsi_class.hpp Co-authored-by: Mathias Stearn <[email protected]> * Change to empty string for internal field name Co-authored-by: Mathias Stearn <[email protected]>
kraenhansen
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Oct 18, 2022
…formance gain (#4863) * Statically cache the String value of g_internal_field for a small performance gain * Fix lint * Update src/jsi/jsi_class.hpp Co-authored-by: Mathias Stearn <[email protected]> * Update src/jsi/jsi_class.hpp Co-authored-by: Mathias Stearn <[email protected]> * Change to empty string for internal field name Co-authored-by: Mathias Stearn <[email protected]>
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What, How & Why?
This optimisation yields a small (~5% with Hermes disabled, ~2% with Hermes enabled) performance improvement with our benchmark suite, as it avoids the overhead of repeatedly creating the JSI String object.
☑️ ToDos
Compatibilitylabel is updated or copied from previous entrypackage.jsons (if updating internal packages)Breakinglabel has been applied or is not necessaryIf this PR adds or changes public API's: