A quick comparison with python:
> time python -c 'print("Hello world!")'
Hello world!
0.03s user 0.01s system 80% cpu 0.048 total
> /usr/bin/time -l python -c 'print("Hello world!")'
Hello world!
0.04 real 0.02 user 0.01 sys
6 maximum resident set size (MB)
2110 page reclaims
24 involuntary context switches
So the Python version *takes 5x longer*, and uses *3x more memory.*
On Tue, Nov 12, 2019 at 12:58 PM Nate Sutton <[email protected]> wrote:
> Another way to achieve fast startup is to compile clojurescript to a
> nodejs target and then use the nodejs library called pkg to bundle the
> nodejs binary with the script. I haven't timed it but it's an interesting
> alternative.
>
> On Tue, Nov 12, 2019 at 12:46 PM Colin Yates <[email protected]>
> wrote:
>
>> Do we have any idea how that memory saving scales?
>>
>> I know a bunch of meta data isn’t needed as it is hotspot specific, but
>> are there any other memory savings?
>>
>> Sent from my iPhone
>>
>> On 12 Nov 2019, at 18:42, Alan Thompson <[email protected]> wrote:
>>
>> 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
>>>
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