Guys,

that buys us a nice speed up in Dromaeo:
http://dromaeo.com/?id=74679,74680 (patched version is 74680).  I was
surprised to see it slightly slows down accessors (I suspect it's just
a matter of fast case, would investigate).

My main concern is if it is too test specific: yes, JSC special cases
appending a single character, but they do it on string concatenation
as they have no notion of flattening.  Maybe we should just flatten
fastly any flat second of cons.

However, as I miss real data about string shapes (would launch on
golem, but I am not sure it exercises Write at all) I decided to go
with the simplest things---it's rather easy to adjust if we find where
we fail.

Ivan, what's your external account I should use for reviews?

yours,
anton.

On Tue, Sep 29, 2009 at 11:52 AM,  <[email protected]> wrote:
> http://codereview.chromium.org/248031
>

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