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How efficient is locking an unlocked mutex? What is the cost of a mutex?
...ens often, then multiple locks would increase parallelism. At the cost of maintainability, since more locking means more debugging of the locking.
How efficient is it to lock a mutex? I.e. how much assembler instructions are there likely and how much time do they take (in the case that the mutex...
Should a function have only one return statement?
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172
This is known as a "guard statement" is Fowler's Refactoring.
– Lars Westergren
Sep 26 '08 at 10:22
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Naming returned columns in Pandas aggregate function? [duplicate]
... height age Seed
# 1 4.51 3 301
# 15 10.89 5 301
# 29 28.72 10 301
# 43 41.74 15 301
# 57 52.70 20 301
df = data.groupby('Seed').agg(
{'age':['sum'],
'height':['mean', 'std']})
print(df.head())
# age height
# sum std me...
Math.random() versus Random.nextInt(int)
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GiliGili
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Where can I learn how to write C code to speed up slow R functions? [closed]
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72
Well there is the good old Use the source, Luke! --- R itself has plenty of (very efficient) C ...
Pelican 3.3 pelican-quickstart error “ValueError: unknown locale: UTF-8”
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asmeurerasmeurer
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How to raise a ValueError?
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John MachinJohn Machin
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String output: format or concat in C#?
... average of 224ms vs. 48ms, an x4.66 improvement, even better than your x3.72. I wonder if there is a post-compilation tool that can rewrite the IL of string.Format that doesn't use any composite formatting features (i.e. just simple {0}) and replace them with the considerably faster string concaten...
Need to understand the usage of SemaphoreSlim
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72
i guess that if i run 50 thread at a time then code like SemaphoreSlim ss = new SemaphoreSli...
What are differences between AssemblyVersion, AssemblyFileVersion and AssemblyInformationalVersion?
...Using machine configuration file from C:\Windows\Microsoft.NET\Framework64\v2.0.50727\config\machine.config.
LOG: Post-policy reference: Rhino.Mocks, Version=3.5.0.1336, Culture=neutral, PublicKeyToken=0b3305902db7183f
LOG: Attempting download of new URL [...].
WRN: Comparing the assembly name resul...