Sven,
As a followup, I have an example library that wraps liza (a key-value store
library) in miniprofiler calls
here: http://yellerapp.com/opensource/clojure-miniprofiler-liza.html
Similar could be accomplished for pretty much any other database library
out there, though it depends on how good their abstractions are to whether
that is feasible or not (I tried wrapping JDBC last night and gave up in
horror - the API is super broad and complex).
Tom
On Sunday, 8 February 2015 19:57:26 UTC, Sven Richter wrote:
>
> That sounds really nice, exactly the way one wants it too I think :-)
>
>
> Am Sonntag, 8. Februar 2015 20:37:43 UTC+1 schrieb tcrayford:
>>
>> Hi Sven,
>>
>> Right, but you want to push miniprofiler further down the app than that.
>> For example, with datomic I have a yeller.datomic.instrumented namespace
>> that exports the same vars as datomic.api, but wraps them in miniprofiler
>> tracing. From the point of view of my application code, the only thing that
>> changes is that you require a different namespace, which is significantly
>> easier than littering trace calls everywhere.
>>
>> Does that help?
>>
>> Tom
>>
>> On Sunday, 8 February 2015 08:57:12 UTC, Sven Richter wrote:
>>>
>>> Hi Tom,
>>>
>>> I am not arguing about the performance impact here, however, it's nice
>>> to know there hardly is one. My only concern is that the code reader has to
>>> mentally parse away the trace calls, which puts a small burden on him and
>>> which might be less if it was in some kind of a macro, fn or metadata.
>>> However, I am still a clojure beginner and this was just one thing that
>>> came to my mind when I saw it :-)
>>>
>>> Thanks,
>>> Sven
>>>
>>> Am Samstag, 7. Februar 2015 22:16:04 UTC+1 schrieb tcrayford:
>>>>
>>>> Hi Sven,
>>>>
>>>> So typically I'd put that stuff *much* lower in the database layer -
>>>> ideally as a wrapper around whatever database driver you're using, but
>>>> that
>>>> kind of idea is roughly right.
>>>>
>>>> I am considering releasing a set of libraries for miniprofiler that let
>>>> it wrap e.g. a jdbc driver, redis clients, and so on. This is a clear case
>>>> where having an interface or a protocol at the low level of the database
>>>> driver really helps. That way you'd just import the library, tell it to
>>>> wrap the connection and use it yourself. Would that be useful? Which
>>>> database are you using?
>>>>
>>>> When miniprofiler isn't on, it has pretty minimal performance impact
>>>> (apart from the fact that you're adding more code to your methods which
>>>> can
>>>> have implications for the JIT) - it's just a binding load and a nil?
>>>> check,
>>>> which is pretty quick. I leave that code in production for my app, and
>>>> have
>>>> done since July.
>>>>
>>>> Pushing the profiling information as low in the stack as possible, and
>>>> leaving it on in production is a powerful combination - typically you
>>>> never
>>>> think about profiling or tracing whilst writing your code, but it's always
>>>> there, even in production where you need it.
>>>>
>>>> Hope that helps,
>>>>
>>>> Tom
>>>>
>>>> On Saturday, 7 February 2015 08:21:31 UTC, Sven Richter wrote:
>>>>>
>>>>> Hi,
>>>>>
>>>>> I just tried it and it looks really useful if one wants to track down
>>>>> speed bumps in web apps.
>>>>>
>>>>> I wonder if I understand the usege correctly, right now I did
>>>>> something like this:
>>>>>
>>>>> (defn admin-page [params]
>>>>> (let [users (cjmp/trace "all users" (db/get-all-users (get params
>>>>> :filter)))]
>>>>> (layout/render "user/admin.html" (merge {:users users :roles
>>>>> available-roles}
>>>>> params))))
>>>>>
>>>>>
>>>>> I think this blows the code and one has to remove / add the trace
>>>>> function everytime one wants to profile the code.
>>>>> Maybe it would be an improvement if one could add some metadata to
>>>>> functions which then would be profiled only in dev mode for example?
>>>>>
>>>>> Best Regards,
>>>>> Sven
>>>>>
>>>>>
>>>>> Am Mittwoch, 4. Februar 2015 14:21:28 UTC+1 schrieb tcrayford:
>>>>>>
>>>>>> Ack, minor date error there.
>>>>>>
>>>>>> I've been running Clojure Miniprofiler in production since July 2014,
>>>>>> and it's proved both very stable, and extremely useful.
>>>>>>
>>>>>> On Wednesday, 4 February 2015 13:16:43 UTC, tcrayford wrote:
>>>>>>>
>>>>>>> Clojure Miniprofiler is a simple, but effective profiling tool for
>>>>>>> your web application.
>>>>>>>
>>>>>>> It tells you what is slow about a web page both in production (for
>>>>>>> admins only), and in development, as you load the page.
>>>>>>>
>>>>>>> It's a port of the original .Net library to Clojure, utilizing the
>>>>>>> JavaScript and UI code that was originally written there.
>>>>>>>
>>>>>>> Read more about it here:
>>>>>>>
>>>>>>> http://yellerapp.com/opensource/clojure-miniprofiler.html
>>>>>>>
>>>>>>> And a sample performance debugging session is detailed here:
>>>>>>>
>>>>>>> http://yellerapp.com/posts/2015-02-04-miniprofiler.html
>>>>>>>
>>>>>>> I've been running Clojure Miniprofiler in production since July
>>>>>>> 2015, and it's proved both very stable, and extremely useful.
>>>>>>>
>>>>>>
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