Bootstrapping "Optimizing Squeak"
Eliot & Linda Miranda
elcm at pacbell.net
Sat Feb 27 17:55:20 UTC 1999
Hans-Martin Mosner wrote:
[snip]
> ObjectShare did an image conversion like
> this when they moved from the old bytecode set (which Squeak still uses)
> to the HPS bytecodes which are used in the VisualWorks products until
> today. The HPS bytecodes have been designed for JIT compilation, and the
> ranges of various opcode fields have been adjusted to better match the
> actual use in Smalltalk images. However, I don't know whether they used
> something like the SystemTracer or an external image converter tool. I
> vaguely remember talking with Peter Deutsch about the topic, but don't
> know anymore what his answer was...
It was/is an external tool, written in Smalltalk. Its analogous to the tracer,
but works by reading in an image file, converting the object graph and writing a
new image.
_______________,,,^..^,,,_______________
Eliot Miranda, ObjectShare
More information about the Squeak-dev
mailing list
|