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How does the new automatic reference counting mechanism work?
...ually decide to look at everything it can find starting from the stack and CPU registers. It will never find A,B1,B2,B3 so it will finalize them and recycle the memory into other objects.
When you use ARC or MRC, and finish with A it have a refcount of 3 (B1, B2, and B3 all reference it), and B1/...
Is inline assembly language slower than native C++ code?
...ion scheduling, for example, is very hard to tune by hand) and modern CISC CPUs have very long pipelines too.
For some complex microcontrollers even system libraries are written in C instead of assembly because their compilers produce a better (and easy to maintain) final code.
Compilers sometimes...
How to 'bulk update' with Django?
...10's to 100's. The size of the batch that is right for you depends on your CPU and query complexity. This tool is more like a wheel barrow than a dump truck.
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C# Thread safe fast(est) counter
...d" to (x64).
This "bus lock" statement locks the bus to prevent another CPU from accessing the bus while the calling CPU does its operation. Now, take a look at the C# lock() statement's IL. Here you will see calls to Monitor in order to begin or end a section.
In other words, .Net lock() stat...
What are Transient and Volatile Modifiers?
...le variable will be read from the computer's main memory, and not from the CPU cache, and that every write to a volatile variable will be written to main memory, and not just to the CPU cache.
2) transient keyword cannot be used along with static keyword but volatile can be used along with static.
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How does Go compile so quickly?
...sform the text into binary.
The Go compiler targets only a small number of CPU architectures, while the GCC compiler targets a large number of CPUs
Compilers which were designed with the goal of high compilation speed, such as Jikes, are fast. On a 2GHz CPU, Jikes can compile 20000+ lines of Java co...
What do people find difficult about C pointers? [closed]
...ng a bit too deep in their answers. An understanding of scheduling, actual CPU operations, or assembly-level memory management isn't really required.
When I was teaching, I found the following holes in students' understanding to be the most common source of problems:
Heap vs Stack storage. It is ...
How to exclude a directory in find . command
...fference. Do keep in mind that which command start first will benefit from cpu performance, the later cpu warm up > performance drop cause minor slow down (I did purge cache before each command as @ndemou suggestion)
– Huy.PhamNhu
Sep 28 '17 at 17:35
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HashSet vs. List performance
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@hypehuman the CPU cannot work directly on data in the system memory but pulls in data from the memory into its cache to work on. There is a significant delay between the request for memory to be moved and the memory actually arriving so th...
What are the pros and cons of performing calculations in sql vs. in your application
...tatements to avoid unnecessary data access)
don't push the database to its CPU limits with complex, concurrent calculations (in favour of pulling data into application memory and performing calculations there)
In my experience, with a decent DBA and some decent knowledge about your decent database...