cocos2d/cocos2d-iphone — comment on commit 755d91f56d6371b78abf1202f55b25301b1045bf
File: cocos2d/CCParticleBatchNode.h line 42
By Krishna-666:

+ * A CCParticleBatchNode can reference one and only one texture (one image file, one texture atlas).

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+ * Only the CCParticleSystems that are contained in that texture can be added to the CCSpriteBatchNode.

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+ * All CCParticleSystems added to a CCSpriteBatchNode are drawn in one OpenGL ES draw call.

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+ * If the CCParticleSystems are not added to a CCParticleBatchNode then an OpenGL ES draw call will be needed for each one, which is less efficient.