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Questions - parallelism-amdahl

Evaluating methods in parallel

Let's say I need the output from the below independent methods var x = LongCalculation(123) var y = LongCalculation2(345) var z = LongCalculation3(678) var b = LongCalculation4(910) What is the least...
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alenyb

c#

parallel-processing

parallelism-amdahl

concurrent-processing

Votes: 0

Answers: 3

Latest Answer

I guess the least invasive way is using Parallel.Invoke: long x, y, z, b; Parallel.Invoke( () => x = LongCalculation(123), () => y = LongCalculation2(345), () => z = LongCalculati...
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Clemens

Very slow example parallel code in python, slower then serial

I am trying to learn parallel programming with python 3 and have troubles with all the toy examples. Particularly, get any code from textbook/course/youtube, try to execute it and... get very slow wor...
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QFireball

python

performance

parallel-processing

multiprocessing

parallelism-amdahl

Votes: 0

Answers: 2

Latest Answer

What is howmany_within_range? Is it a quick operation or a slow operation. Remember that multiprocessing has an overhead. Your main program has to package up the arguments, send them to another proc...
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Frank Yellin

Why my code runs so much slower with joblib.Parallel() than without?

I am new to use joblib.Parallel() to speed up some massive numpy.fft calculations. I follow this example presented on joblib-web Using the example, I can see following result on my computer: Elapsed t...
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Wu-O

python

parallel-processing

joblib

parallelism-amdahl

memmap

Votes: 0

Answers: 1

Latest Answer

Q :" Can someone help me "why"? " A :Sure, your code has acquired IMMENSE add-on overhead-costs, and it keeps repeating collecting 65536 x ( that many times!!) the :SER / xfer /...
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user3666197

How to call same function in parallel with executor service in JAVA?

I am new to concurrency and threading in java and I have this following scenario - Function1(fetches next task from a queue and calls function2 with task) then Function2(calls Function Run to run thi...
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TheOnlyKiller

java

multithreading

concurrency

executorservice

parallelism-amdahl

Votes: 0

Answers: 1

Latest Answer

The run(Task task) method contains future.get(); at the end: this means that your current thread will block until the submitted operation is completed. Hence if you make 3x calls to run(Task task) in ...
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DuncG

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