IT/Software career thread: Invert binary trees for dollars.
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Guest, did you like the last podcast notification?? Well here's the second one, and for the third podcast! Yep. This Thursday 8-8-24 at 7pm Central
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Vinen
God is dead
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The whole point is that you are taught the coding practice of using... using statements whenever using an object which implements IDisposible.
USING USING USING USING...
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No, it was more like
Reading that with Java scope levels is really confusing because I thought var was collected already.
Lendarios
Trump's Staff
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Items on managed memory get cleaned up when there are no pointers that accesses it. That is the rule of thumb for the GC.
Sort of a two list system, first list is the list of pointers to a memory address of something. Second list is the actual memory address range.(your data is located in those addresses)
When you create a variable it goes to both lists, first list is the pointer saying where your data is, and the second list is the memory address that contains your data. Whenever variables go out of scope, the pointer is removed from the first list, the data is kept on memory occupying memory space.
Periodically the GC looks at the second list and deletes the records from that list that don't have a pointer on list A pointing to it. This process actually frees up memory
It bears some similarity to a FAT table and file data.
Deleting does not deletes the data, is simply removes the record from the fat table, the data is still there.
Sort of a two list system, first list is the list of pointers to a memory address of something. Second list is the actual memory address range.(your data is located in those addresses)
When you create a variable it goes to both lists, first list is the pointer saying where your data is, and the second list is the memory address that contains your data. Whenever variables go out of scope, the pointer is removed from the first list, the data is kept on memory occupying memory space.
Periodically the GC looks at the second list and deletes the records from that list that don't have a pointer on list A pointing to it. This process actually frees up memory
It bears some similarity to a FAT table and file data.
Deleting does not deletes the data, is simply removes the record from the fat table, the data is still there.
Aka a logical delete. Which is pretty standard practice in many systems since its quicker to just tombstone something then delete it for real later.
Vinen
God is dead
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If you have multiple levels of using you are probably writing your methods incorrectly and in an untestable manner.
BTW:.net - Nested using statements in C# - Stack Overflow
Tuco
I got Tuco'd!
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Not sure if you're recommending the top recommendation there:
using (StreamReader outFile = new StreamReader(outputFile.OpenRead
emoji_nose:using (StreamReader expFile = new StreamReader(expectedFile.OpenRead
emoji_nose:{
///...
}
Or suggesting an explosion of functions to reduce the nested size by transferring it to the call stack, but either way this is the kind of programming argument I don't really care either way about. I like managing my own memory like an old man yells at clouds.
Lendarios
Trump's Staff
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Tuco
I got Tuco'd!
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Not bothering me in the least! At this point I think you've spent more time on it than I have! It's most likely some dumb shit I'm doing.
I think that type of using only works if all the elements are the same.
Vinen
God is dead
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Yep, has to be the same type. I'm not sure about the one I linked. I don't like how it looks and it likely works the same way as this.
Lendarios
Trump's Staff
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I struggled with C# memory stuff for awhile. I couldn't believe there was no memcpy etc.
Most of my leaks have been events. Like if you have an objectA with an event and another objectB registers on it, nulling objectA won't free it until objectB unregs the event.
Also if you have alot of small structures or classes that get created and destroyed alot, use a pool class to reuse the memory. In my precomputed visibility stuff it got me huge gains just by not bloating up the garbage and eating up cpu cleaning it up.
Most of my leaks have been events. Like if you have an objectA with an event and another objectB registers on it, nulling objectA won't free it until objectB unregs the event.
Also if you have alot of small structures or classes that get created and destroyed alot, use a pool class to reuse the memory. In my precomputed visibility stuff it got me huge gains just by not bloating up the garbage and eating up cpu cleaning it up.
Noodleface
A Mod Real Quick
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Well a month of basically getting changing requirements every hour (seriously, back and forth back and forth), we were finally able to release a production BIOS for one server SKU.
The way things were done here really has me scratching my head.
The way things were done here really has me scratching my head.
Tuco
I got Tuco'd!
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So the memory leak was kind of lame since it's just me not knowing Unity well enough and not some C# garbage collection nonsense.
Basically I'm constantly instantiating Meshes:
Unity - Scripting API:
And just assuming they are removed from memory when I stop referencing them. Instead the Unity engine keeps a reference of this class of objects and I have to call Destroy:
Unity - Scripting API:
To properly dispose of them.
Basically I'm constantly instantiating Meshes:
Unity - Scripting API:
And just assuming they are removed from memory when I stop referencing them. Instead the Unity engine keeps a reference of this class of objects and I have to call Destroy:
Unity - Scripting API:
To properly dispose of them.
Tuco
I got Tuco'd!
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Thanks.
Oh and because the C# GC calls the destruct component in its own thread and Unity won't let me call Destroy outside of the main render thread, I can't use a destructor to ensure that my shit is cleared when the class that holds the mesh is destructed. I need to do an explicit soft-delete of the class then dereference it.
C# really isn't to blame here, and it's probably not Unity's fault and I'm probably using the tool wrong, but this kind of behavior is what bothers me about not managing my own memory.
Oh and because the C# GC calls the destruct component in its own thread and Unity won't let me call Destroy outside of the main render thread, I can't use a destructor to ensure that my shit is cleared when the class that holds the mesh is destructed. I need to do an explicit soft-delete of the class then dereference it.
C# really isn't to blame here, and it's probably not Unity's fault and I'm probably using the tool wrong, but this kind of behavior is what bothers me about not managing my own memory.
Tomorrow I shall be doing my homework. Everyone prepare your lowest level skills in creating your own function and basic basic arrays in C++. I will be calling upon you!!
moontayle
Golden Squire
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Meant to post this earlier but I finally got my project into a state good enough to pass into beta testing. Now I just wait for feedback and get working on the next thing in the meantime. Three months in the making (roughly), a complete rewrite of the primary network app for our devices. Lot of learning, pushing myself to not just do a straight conversion of the old code, and a lot of trial and error. Put the last piece in today (a custom view that parses the last 50 lines of our debug log and displays to the screen) and handed it off.
Feels good man.
Feels good man.
Noodleface
A Mod Real Quick
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I have to take a foundations of engineering class at work that all "engineers" need to take when they are hired. It's like 100 other people - 4 days at 9 hours each day. The really shitty thing is its all talk about software layers and Hadoop clusters and hive and json.. And here I am, probably the only hardware engineer in the room feeling like I'm wasting my time. You can tell everyone else has raging boners
Oh and they're feeding us and it's worse than high-school cafeteria food.
Oh and they're feeding us and it's worse than high-school cafeteria food.