In my initial post, I failed to mention the huge memory savings achieved by
the standalone executable (in addition to the startup time savings).
Note that using *time* at the command line resolves to a shell built-in
command. We can get more information from the standard Unix version of time:
# JVM+UberJar
> /usr/bin/time -l java -jar
target/hello-world-0.1.0-SNAPSHOT-standalone.jar
Hello, World!
Goodbye...
1.20 real 2.47 user 0.24 sys
409 maximum resident set size (MB)
100469 page reclaims
3569 involuntary context switches
# Static Executable
> /usr/bin/time -l target/hello-world
Hello, World!
Goodbye...
0.00 real 0.00 user 0.00 sys
2 maximum resident set size (MB)
657 page reclaims
4 involuntary context switches
So we see that the maximum RSS memory requirement *was reduced from 409 MB
to 2 MB*. Yes, an improvement *over 200x!* Note also that context switches
have been *reduced by 900x,* and page reclaims by *about 200x*.
So, it is the combination of reduced startup time and vastly reduced memory
requirements that make standalone executables ideal for short-lived tasks,
especially in constrained environments such as serverless/lambda.
On Sun, Nov 10, 2019 at 7:54 AM Michiel Borkent <[email protected]>
wrote:
> Might be worth mentioning that lread and I are collecting information
> about GraalVM here:
>
> https://github.com/lread/clj-graal-docs
>
> --
> You received this message because you are subscribed to the Google
> Groups "Clojure" group.
> To post to this group, send email to [email protected]
> Note that posts from new members are moderated - please be patient with
> your first post.
> To unsubscribe from this group, send email to
> [email protected]
> For more options, visit this group at
> http://groups.google.com/group/clojure?hl=en
> ---
> You received this message because you are subscribed to the Google Groups
> "Clojure" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to [email protected].
> To view this discussion on the web visit
> https://groups.google.com/d/msgid/clojure/8dbd1a23-61b4-42dc-8815-3d8422956901%40googlegroups.com
> <https://groups.google.com/d/msgid/clojure/8dbd1a23-61b4-42dc-8815-3d8422956901%40googlegroups.com?utm_medium=email&utm_source=footer>
> .
>
--
You received this message because you are subscribed to the Google
Groups "Clojure" group.
To post to this group, send email to [email protected]
Note that posts from new members are moderated - please be patient with your
first post.
To unsubscribe from this group, send email to
[email protected]
For more options, visit this group at
http://groups.google.com/group/clojure?hl=en
---
You received this message because you are subscribed to the Google Groups
"Clojure" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To view this discussion on the web visit
https://groups.google.com/d/msgid/clojure/CAN67zA1USV_sX0bP%3Dg-p0r7%2BqMOvYscWY9aj7yBnYsSeikcskQ%40mail.gmail.com.
