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TCP loopback connection vs Unix Domain Socket performance
...x Domain Sockets (UDS), and PIPEs.
Here you have the results on a single CPU 3.3GHz Linux machine :
TCP average latency: 6 us
UDS average latency: 2 us
PIPE average latency: 2 us
TCP average throughput: 0.253702 million msg/s
UDS average throughput: 1.733874 million msg/s
PIPE average throug...
Why can't C compilers rearrange struct members to eliminate alignment padding? [duplicate]
...lation unit (for example: a foreign library, a file on disc, network data, CPU page tables, ...). In such a case the binary structure of data is also defined in a place inaccessible to the compiler, so reordering the struct fields would create a data type that is inconsistent with the other definiti...
How can I propagate exceptions between threads?
...d). Within the body of the function we spawn multiple worker threads to do CPU intensive work, wait for all threads to finish, then return the result on the main thread.
...
C# List of objects, how do I get the sum of a property
...recommend you change it to: "Here is how you could do it" and "Here is the cpu performance of each option". Also in principle if you describe your testing methodology you need-not show us the code.
– Meirion Hughes
Feb 19 '16 at 10:08
...
Python Process Pool non-daemonic?
...getting memory leak with this try using "with closing(MyPool(processes=num_cpu)) as pool:" to dispose of the pool properly
– Chris Lucian
Mar 15 '15 at 7:00
32
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Verify if a point is Land or Water in Google Maps
...and it is working not too bad... you can improve the test if you have more cpu to waste by adding pixels.
function isItWatter($lat,$lng) {
$GMAPStaticUrl = "https://maps.googleapis.com/maps/api/staticmap?center=".$lat.",".$lng."&size=40x40&maptype=roadmap&sensor=false&zoom=12&a...
Progress indicator during pandas operations
..., njobs=-1, **kwargs):
if njobs == -1:
njobs = multiprocessing.cpu_count()
pool = multiprocessing.Pool(processes=njobs)
try:
splits = np.array_split(df[subset], njobs)
except ValueError:
splits = np.array_split(df, njobs)
pool_data = [(split_ind, df_spli...
Cosmic Rays: what is the probability they will affect a program?
...
More importantly, the chip feature size for CPUs in 1995 was around 0.35 µm or 350nm. It's now 1/10th that size at 35nm.
– Joe Koberg
Apr 5 '10 at 21:02
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App Inventor 2 SQLite 拓展：超流行兼容主流SQL语法的迷你本地数据库引擎 ...
...不需要回复的可留空~ 请描述您的问题（300字以内）： 给个鼓励也行呐~o~ 提供截图（仅截取当前可视区域...
Count(*) vs Count(1) - SQL Server
..., query store overhead, triggers, etc.). It is maybe a few thousand extra CPU instructions. So, count(1) does a tiny bit less work during compilation (which will usually happen once and the plan is cached across multiple subsequent executions). For execution time, assuming the plans are the same ...