saving a Shen/Scheme image

[Mark Tarver]

The Shen/Scheme image does not contain stlib;  I'm always loading it.  Is there a way of saving the image as in SBCL?

Mark

[Bruno Deferrari]

I don't know of any way of saving a running session with the Chez runtime, but there are some alternatives:

A) create an alternative boot image that already includes the stdlib code

B) create a precompiled library (in binary form) of the stdlib code that will load more quickly

Either of these options can (potentially) also give you better performance too (code that is loaded from the REPL cannot be optimized as well as code that is batch-compiled).

Let me think about how to provide a way to do this easily from Shen/Scheme.

On Sat, Sep 3, 2022 at 5:48 PM Mark Tarver <dr.mt...@gmail.com> wrote:

The Shen/Scheme image does not contain stlib;  I'm always loading it.  Is there a way of saving the image as in SBCL?

Mark

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BD

[nha...@gmail.com]

The boot image version has the benefit of moving all the data into a static GC generation that never gets collected.

[Mark Tarver]

If there was some sort of consult file that be loaded easily then that would do;  stlib

loads in just over a second.

Mark

[Bruno Deferrari]

How about a .bat file to launch shen? containing something like:

shen.exe eval -l init.shen -r

-l file <- loads that file at startup
-r <- launches the REPL

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BD

[Mark Tarver]

That's great - it works.  However the REPL does jabber on when I load

stlib and I tried including (set *hush* true) in the init file, but it does

not work in Scheme/Shen.

Mark

[Bruno Deferrari]

Ok, the problem is that the optimized `pr` override is buggy and doesn't respect *hush* like the default implementation. I will push a new release with the fix soon.

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BD

[Bruno Deferrari]

You can try: https://github.com/tizoc/shen-scheme/releases/tag/v0.25.5

Btw, there is a command line flat "-q" that sets hush to true before continuing with the following steps (but you have to set it to false again somewhere in the code):

shen.exe eval -q -l init.shen -r

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BD

[Bruno Deferrari]

These are the accepted commandline options btw:

commands:

repl

Launches the interactive REPL.

Default action if no command is supplied.

script <FILE> [<ARGS>]

Runs the script in FILE. *argv* is set to [FILE | ARGS].

eval <ARGS>

Evaluates expressions and files. ARGS are evaluated from

left to right and can be a combination of:

-e, --eval <EXPR>

Evaluates EXPR and prints result.

-l, --load <FILE>

Reads and evaluates FILE.

-q, --quiet

Silences interactive output.

-s, --set <KEY> <VALUE>

Evaluates KEY, VALUE and sets as global.

-r, --repl

Launches the interactive REPL after evaluating

all the previous expresions.

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BD