From: Eric Wong <normalperson@...>
Date: 2017-05-04T20:36:02+00:00
Subject: [ruby-core:80997] Re: [Ruby trunk Feature#13544] Allow loading an ISeqs sequence directly from a C extension without requiring buffer is in an RVALUE

sam.saffron@gmail.com wrote:
> https://bugs.ruby-lang.org/issues/13544

> Currently the only way to load an InstructionSequence is to load the data into a Ruby RVALUE and then pass it to #load_from_binary
> 
> This is inefficient as it forces one extra potentially very large RVALUE slot.

Can using String#clear help your case right now?

> It would be nice if c extensions could load an instruction sequence directly from c buffer. 

Maybe adding mmap support (at least read-only) to IO objects can
support this...

There will be portability problems, though; and we need to be
careful about the file being changed (especially truncated)
while reading via mmap is happening.

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