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[Bug 23369] Provide hooks for Typed Arrays (ArrayBuffer and friends)

From: <bugzilla@jessica.w3.org>
Date: Thu, 19 Jun 2014 00:44:40 +0000
To: public-script-coord@w3.org
Message-ID: <bug-23369-3890-IU828Mi7Oh@http.www.w3.org/Bugs/Public/>

--- Comment #38 from Allen Wirfs-Brock <allen@wirfs-brock.com> ---
(In reply to Ryan Sleevi from comment #37)

Thanks, this is enlightening.

As an overall comment, I think your starting premise is wrong. ES programmers
don't necessarily think about this sort of processing in the same way that a
C/C++ programmer would.  In particular, they don't generally think about this
local memory management/buffer reuse like this. In this  case I suspect that
incrementally accumulating  into a common buffer wouldn't even occur to many ES
programmer. They would probably just do concatenations along the way and expect
intermediate results that are no longer needed to get garbage collected.

Regarding your approach, I suspect the extra copying (and related memory
management overhead) you are proposing on calls into your subsystem, would just
about balance out savings you get from using the accumulating buffer. Working
with immutable independent buffers seems conceptually much simpler and more
along the lines of what a good ES programmer would expect.

This sort of ES based thinking really should be a factor in your API designs.
Don't assume that the ES developer will approach problems just like a C++

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