Re: [Columba-devel] Memory Monitor

[Riyad K. <rs...@em...>]

Wow thanks for the kind words Timo,

Yes the memory will always slowly increase (few bytes) because to paint 
the ever changing numbers its necessary to convert the number to a 
String (for the TextField) then format it. Thankfully this isn't very 
expensive and is more of a side effect than anything.

If it weren't the text fields though, it would be the progress bar 
rendering. It seems there is always something that costs a few bytes a 
second to keep that bar always changing.

Now the reason you don't see this with IntelliJ or JEdit is because they 
are showing MB instead of KB. I used KB to give more granularity for 
testers, but if we changed it to MB, I'm pretty sure it wouldn't change 
very much.

Also looking into the code you might notice that I don't do a check on 
the currentMem or totalMem before updating their values, this is for 2 
reasons:

1) The memory is constantly changing, and checking for equality before 
setting it is only true for currentMem about 5% of the time, while for 
totalMem its true for about 50-80% of the time.

2) The biggest reason is that to compare required converting one or the 
other of the values (from the textfield or from the Runtime call) into a 
number or string, which effectively doubles (no matter what) the number 
of conversions. So just to avoid that, and assume the memory will be 
changing pretty often, I just perform an update.

Let me know if you guys think this sounds ok, I'm happy to change it.

Best,
-Riyad

ts...@ru... wrote:

>>Erik,
>>
>>Actually you bring up something I wanted to ask; can we make the 
>>AboutDialog not modal? Because of the new utility of it, it seems people 
>>will want to keep it open while doing stuff to watch the usage, and 
>>right now they can't. It seems to me making this non-modal would be 
>>somewhat helpful.
> 
> 
> First of all - thats more than i dreamed of! This is amazing. It will surely help
> reducing the memory usage and give a better feeling where the *big consumers*
> are. But that will work better if it where non-modal.
> 
> 
>>Also can you take a screenshot of the text boxes so I have an idea of 
>>how much bigger to make them? On my machine (windows 2k3, jdk 1.4.2_02) 
>>I actually have about 1 character too much of extra room, so I can't 
>>really judge how much bigger I should make them.
> 
> 
> On my gentoo-linux sun Jdk 1.4.2_02 its also fine.
> 
> 
>>Best,
>>-Riyad
> 
> 
> Did you see that memory usage is constantly increasing without doing anything?
> When you trigger the garbage collector it goes back to where it started. Is this
> also true on win2k? Does it come from your memory monitor?
> 
> Cheers,
> Timo
> 
> 
> 
> 
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