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_[Original comment](https://code.google.com/p/guava-libraries/issues/detail?id=1268#c6) posted by **[email protected]** on 2013-01-28 at 06:28 PM_ --- > Chris, I'm not sure I follow how ForwardingImmutableList would work, or > would save anything? We can sacrifice...

_[Original comment](https://code.google.com/p/guava-libraries/issues/detail?id=1268#c7) posted by **[email protected]** on 2013-01-28 at 06:34 PM_ --- To be clear, I'm arguing that the benchmark _overestimates_ the speed of ArrayList. I also have to admit that...

_[Original comment](https://code.google.com/p/guava-libraries/issues/detail?id=1268#c8) posted by **travis.downs** on 2013-01-30 at 06:17 AM_ --- Given the discussion so far, I think there is a bit of a misunderstanding about what makes things slow,...

_[Original comment](https://code.google.com/p/guava-libraries/issues/detail?id=1268#c9) posted by **travis.downs** on 2013-01-30 at 06:54 AM_ --- Here are the gory details about JIT method inlining & optimization in general. When I say "JIT" here, I...

_[Original comment](https://code.google.com/p/guava-libraries/issues/detail?id=1268#c10) posted by **travis.downs** on 2013-01-30 at 07:09 AM_ --- All that said, if were building this myself, here are the choices I would make: Two concrete implementations of...

_[Original comment](https://code.google.com/p/guava-libraries/issues/detail?id=1268#c11) posted by **travis.downs** on 2013-01-30 at 07:10 AM_ --- Sorry, above OtherImmutableList == RegularImmutableList, made a last second edit that I can't fix now.

_[Original comment](https://code.google.com/p/guava-libraries/issues/detail?id=1268#c12) posted by **[email protected]** on 2013-01-30 at 03:31 PM_ --- Thanks for all the details. I'm bookmarking this for future reference. When it comes to other implementations, my concern...

_[Original comment](https://code.google.com/p/guava-libraries/issues/detail?id=1268#c13) posted by **[email protected]** on 2013-01-30 at 04:31 PM_ --- tl;dr https://wikis.oracle.com/display/HotSpotInternals/PerformanceTechniques

_[Original comment](https://code.google.com/p/guava-libraries/issues/detail?id=1268#c14) posted by **[email protected]** on 2013-01-30 at 05:46 PM_ --- @cpovirk: I'm fairly convinced that making sure the "common case" -- a vanilla ImmutableList -- is monomorphic should be...

_[Original comment](https://code.google.com/p/guava-libraries/issues/detail?id=1268#c15) posted by **travis.downs** on 2013-01-30 at 06:11 PM_ --- Yeah I guess the ImmutableAsList stuff can definitely cause issues too, but as you point out it all comes...