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I am really new to Java and I read that "synchronized" is "very expensive" in Java. All I want to know is what is expensive and how is it expensive? Thanks.
Started by kunjaan on
, 6 posts
by 6 people.
Answer Snippets (Read the full thread at stackoverflow):
It is even expensive when you use language is generally more expensive....
It is like a bottleneck.
Maybe it's not as bad as you think
Here is a good article about it
It is expensive because if you one of them may be executed at a time.
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I have been told that UIWebView are big and expensive (memory and computationally) to create and retain. Is this true? and how expensive are they?
Answer Snippets (Read the full thread at stackoverflow):
I thought....
Personally, I use one UIWebView in my app (with the singleton pattern), and change its content at each displaying .
The Instruments application's memory and CPU monitors will let you test and find out .
It'll depend on what you're loading in them.
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What are some of the most expensive operations in PHP? I know things like overusing the @ operator can be expensive. What else would you consider?
Started by Darrell Brogdon on
, 9 posts
by 9 people.
Answer Snippets (Read the full thread at stackoverflow):
Try and join all.
Cost time)
foreach() statements, especially with nesting, are frequently expensive; though own experience the most expensive operation in real terms is the echo statement.
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Theres no reason for houses to cost passed $20,000. all they are is a bunch of 2x4's nailed together to make the outline, then you put the boarding in for the floors and walls. then you just get some electronics master to slip the wires through the house...
Started by hadoken on
, 20 posts
by 13 people.
Answer Snippets (Read the full thread at gamespot):
I know which one I would prefer as an asset [Quote... .
Spoken like a true 14 year old.
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Do calling an API function considered an expensive operation? (when comparing it to a function call which is part of my application)
I understand that some API functions cause a leap to kernel mode but is it true for all of them?
More specific: how expensive...
Started by Eli on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
API's that read.
GetThreadId of an arbitrary thread requires a kernel switch, so it more expensive than that transitions to kernel mode is much more expensive, on the order of microseconds.
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What are the most expensive (both in terms of bytecode and cpu cycles) statements in the Java Programming language?
Started by Kevin Boyd on
, 7 posts
by 7 people.
Answer Snippets (Read the full thread at stackoverflow):
So the most expensive calls on modern hardware are memory accesses that miss the cache, it has almost nothing to do with "....
To machine code, so the question would be: what is the most expensive assembly call on your hardware is far away.
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Hi
I was just wondering what's the most expensive Software available for commercial/private use?
Started by gsharp on
, 9 posts
by 9 people.
Answer Snippets (Read the full thread at superuser):
I might possibly sell the most expensive software development suites as being the most expensive commercial software available for private use to pay $4,000,000.00 in restitution to Microsoft, making....
This is a really subjective question.
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Hello, how expensive is it to perform the dereference operation on a pointer in C++? I can imagine that the memory transfer is somehow proportional to the object size, but I want to know how expensive the dereference operation part is.
Thank you.
Started by tunnuz on
, 7 posts
by 7 people.
Answer Snippets (Read the full thread at stackoverflow):
Dereferencing can be expensive mostly because it costs an instruction to fetch data from memory.
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Which of the following pieces of code is more expensive?
x = my_array.inject {|sum,i| int+=i }
or
x = eval(my_array.join('+'))
Started by gmile on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
Try them:
#!/usr/local/bin/ruby -w require 'benchmark' iterations = 1 Benchmark.bmbm do |bench| numbers = (1..100).to_a bench.report('inject') do x = numbers.inject { |sum, num| sum + num } end bench.report('eval') do x = eval(numbers.join('+')) end end... .
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Hi,
I'm doing some calculations of comparing two strings. In case I know they are same length, is it more expensive to call isprefix or If ("string"=="string") ?
Started by Skuta on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
I would expect no significant difference at the core, as IsPrefix is essentially:
public bool IsPrefix(string comp, string... .
Why not test? Easy enough to use the StopWatch class to compare, and include different length strings and different compare options .
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