)

* Fix the error when 3d particle prefab run go back in editor.

* refine culling

* optimize 2d particle

* optimize 2d particle

* optimize 2d particle

* code style

* code style

* annotation

* fix issue that destroy asset twice

* fix that register audio handler failed

* fix preloading

* refine

* refine api docs

* setTexture with a url of image is not supported anymore

* refine

* refine loadNativeFile aviod repeating download

* avoid releasing asset in other bundle

* refine

…os#6421)" (cocos#6431)

This reverts commit 32a27b8.

* 修复bug cocos#6387

cocos#6387

* Update blend-func.js

* Update blend-func.js

* Update blend-func.js

* fixed that texture can not update when there is no image

* refine

* spine set default skin

* reform

* remove raw asset

* polish autoReleaseAssets

* update deprecate info

* update deprecate info

* should call start, update, lateUpdate only if they are functions

* rm mesh module in 3D module

* refine code

fix unit test

add _reverse to Rotate action

* Correct the misspelling of TOUCH_MOVE.

* Commit changes

)

This reverts commit 46f3c4e.

* Fix some errors in API documentation.

* Commit changes

* Commit changes

* throw an error when no image available

* refine

…cocos#7372)

* fix click video player callback use isPlaying when the pause invalid

* refine code

* fix set font failed in native

* return error when load direct asset failed even assetManager.force is enabled

* Use copy if requests is array

…os#7395)

* record remote server address

* refine

调整依据: 
FPS 通常是人么最关系的.
DrawCall 次之.
而三个关于时间的指标 应该放在一起.

* fix memory leaks

* free after uploading

* check bundle before create one

* revert

* revert

* revert

* hack iOS 14 buffer switching mechanism

* refine

* add description

This reverts commit 26031bd.

Sync master to 2.4