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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 free memory in Java?
...new in the last six years) G1 collector is a low-pause model; it uses more CPU overall, but does it's best to never force a hard-stop on execution. Since server CPUs now almost all have multiple cores, this is A Really Good Tradeoff to have available.
Look at your flags tuning memory use. Especial...
Reading binary file and looping over each byte
...orming but easily understandable code can be much preferred. The waste of CPU cycles is compensated for saving "reader CPU cycles" when maintaing the code.
– IllvilJa
Feb 5 '19 at 9:37
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When should I use the “strictfp” keyword in java?
...lations need to be deterministic no matter what the underlying hardware or CPU is. What's the trade-off? Most likely execution time.
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Understanding dispatch_async
... the system has taken your implication that those tasks need to get to the CPU as quickly as possible.
Note also that I say "will begin executing in order", but keep in mind that as concurrent queues things won't necessarily FINISH executing in order depending on length of time for each task.
As ...
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 ...
Is Java a Compiled or an Interpreted programming language ?
...tion to compile the bytecode to native instructions understood by hardware CPU on the fly at runtime.
Some implementations of JVM may choose to interpret the bytecode instead of JIT compiling it to machine code, and running it directly. While this is still considered an "interpreter," It's quite ...
NSOperation vs Grand Central Dispatch
...down of these NSOperations was accounting for a significant portion of the CPU cycles in the running application, and was slowing things down. I replaced these with simple blocks and a GCD serial queue, and that overhead disappeared, leading to noticeably better rendering performance. This wasn't th...
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...
Which parallel sorting algorithm has the best average case performance?
...ld):
Parallel sorting pattern
Many-core GPU based parallel sorting
Hybrid CPU/GPU parallel sort
Randomized Parallel Sorting Algorithm with an Experimental Study
Highly scalable parallel sorting
Sorting N-Elements Using Natural Order: A New Adaptive Sorting Approach
Update for 2013:
Here is the ble...