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Question by Max Kaufmann · Jan 06, 2010 at 05:08 PM · assetbundle

Does AssetBundleRequest reuse repeat downloads?

If I make multiple AssetBundleRequests to the same asset will it only trigger one http request? If so (it's a stretch, I know), does it reference count to resource to know when to release it, or do I get multiple copies of the same prefab in memory?

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avatar image Brian-Kehrer · Jan 09, 2010 at 08:41 PM 0
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Having blundered the previous question, I'll refrain from saying anything definitive. I know at one point multiple calls would in fact download the asset multiple times, and losing references would not necessarily clean them up automatically. Some of that may have changed, but I believe some manual tracking is still necessary on your part.

avatar image Max Kaufmann · Jan 14, 2010 at 05:23 PM 0
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From my own testing, it not only doesn't reuse GET requests to the same URL, but you'll actually get a runtime exception if you try to decode the same assetBundle from the same URL twice. $$anonymous$$anual tracking is definitely the answer.

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Answer by jonas-echterhoff · Jan 14, 2010 at 02:45 PM

An AssetBundleRequest never initiates a http request - only the WWW class does. The AssetBundleRequest just loads data from the already downloaded AssetBundle.

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avatar image Max Kaufmann · Jan 14, 2010 at 05:32 PM 0
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It makes sense for repeated WWW GETs not to be reused - just because they're idempotent doesn't mean that they always return the same content. But the AssetBundleRequest might detect repeat decodes and reuse content, but actually throws an exception rather than returning a reference to the previous content (confirmed by cooked tests).

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Answer by pretender · Jun 14, 2010 at 12:22 PM

i am curious does asset bundle needs to be download completly in order to use assetbundlerequest and LoadAsync? if it does, that isnt really something special

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avatar image mrai · Feb 15, 2012 at 01:44 AM 0
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yes, before assets can be loaded from an asset bundle, the asset bundle must first be fully downloaded and loaded into memory

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