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Map vs Object in JavaScript
...Took: 67
Firefox Object Took: 54
Firefox Map Took: 139
In terms of memory allocation these behaved the same in terms of freeing/GC but Map used 5 times more memory. This test used 4 keys where as in the last test I only set one key so this would explain the reduction in memory overhead. I ran this ...
Use of 'prototype' vs. 'this' in JavaScript?
...other inheritance patterns as a way to explicitly change the way memory is allocated.
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Optimise PostgreSQL for fast testing
...ries with sorts/aggregations. This is per connection setting and query can allocate that value multiple times. If data can't fit then disk is used (pgsql_tmp). Check "explain analyze" to see how much memory do you need
fsync and synchronous_commit: Default values are safe but If you can tolerate dat...
How is the fork/join framework better than a thread pool?
...econds, not 11.
EDIT: As Joonas points out, tasks are not necessarily pre-allocated to a thread. The idea of fork/join is that a thread can choose to split a task into multiple sub-pieces. So to restate the above:
We have two tasks (ab) and (cd) which take 2 and 11 seconds respectively. Thread 1 s...
How to convert a number to string and vice versa in C++
...roduced in header charconv.
std::to_chars is locale-independent, non-allocating,
and non-throwing.
Only a small subset of formatting policies used by
other libraries (such as std::sprintf) is provided.
From std::to_chars, same for std::from_chars.
The guarantee that std::f...
What is the correct way of using C++11's range-based for?
...nt code, e.g., if these elements are instances of std::string,
heap memory allocations can be done, with expensive trips to the memory manager, etc.
This is useless if we just want to observe the elements in a container.
So, a better syntax is available: capture by const reference, i.e. const auto&...
Hidden Features of MySQL
...le resource when setting these parameters. For example sort_buffer_size is allocated only if MySQL needs to do a sort. Note: be careful not to run out of memory.
If you have many connects established (i.e. a web site without persistent connections) you might improve performance by setting thread_ca...
Differences and relationship between glActiveTexture and glBindTexture
...texture, but they do not technically change its state. The Image functions allocate texture storage and set the texture's format; the SubImage functions just copy pixels around. That is not considered the texture's state.
Allow me to repeat: these are the only functions that modify texture state. g...
What is a NullPointerException, and how do I fix it?
...e initialize like this:
private static String[] foo = new String[2];
we allocate a String[] with two elements that are initialized to null. After that, we have not changed the contents of foo ... so foo[1] will still be null.
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Why would finding a type's initializer throw a NullReferenceException?
...looking. You're absolutely right, what happens is that because we directly allocate an instance of RuntimeType the cctor of Type never gets called, so Type.EmptyTypes remains null and that's what is passed to GetConstructor.
– Kirill Osenkov
Jul 25 '12 at 6:30
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