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How can I repeat a character in Bash?
.../dev/zero | tr '\0' '=' >/dev/null version. Of course you have to use a block size of 100M+ to measure the time difference reasonably. 100M bytes takes 1.7 s and 1 s with the two respective versions shown. I took off the tr and just dumped it to /dev/null and got 0.287 s for the head version and ...
Why is lock(this) {…} bad?
...-only or inaccessible. This is false - I believe those talks are about SyncBlock bit in CLR object so formally this is right - lock modified object itself
– sll
Jun 22 '18 at 16:44
...
Java HashMap performance optimization / alternative
...hash code. Using the old method the average number of puts per second over blocks of 100,000 puts, 100,000 to 2,000,000 was:
168350.17
109409.195
81344.91
64319.023
53780.79
45931.258
39680.29
34972.676
31354.514
28343.062
25562.371
23850.695
22299.22
20998.006
19797.799
18702.951
17702.434
16832.1...
How to create a memory leak in Java?
...d (close() is usually not invoked in the finalizer thread since might be a blocking operation). It's a bad practice not to close, but it doesn't cause a leak. Unclosed java.sql.Connection is the same.
– bestsss
Jul 17 '11 at 18:38
...
glVertexAttribPointer clarification
..., no different from any other buffer object that you might use for uniform blocks, pixel transfer, transform feedback, or any other use. The OpenGL spec never refers to anything as a "vertex buffer object"; even the original extension spec never calls it that.
– Nicol Bolas
...
Difference between Node object and Element object?
...t;p> or it could be a text node that is created by the system to hold a block of text inside another element. So, in a nutshell, a node is any DOM object.
An element is one specific type of node as there are many other types of nodes (text nodes, comment nodes, document nodes, etc...).
The DOM...
Using Build Flavors - Structuring source folders and build.gradle correctly
...
Something that is important and blocked me for quite awhile is that the flavor name that needs to match the package as opposed to the package defined inside the flavor definition in gradle. For example:
src/flavor1/java/com/foo/A.java
will match
produ...
Why is exception handling bad?
... never leave invalid state if they are written properly; since the finally block is guaranteed to be executed, objects can be deallocated there. The rest should be taken care of by variables going out of scope and garbage collection.
– Robert Harvey
Nov 17 '09...
Generate a heatmap in MatPlotLib using a scatter data set
... honestly don't understand why imshow() converts a 2d array of floats into blocks of appropriate color, whereas I do understand what scatter() is supposed to do with such an array.
– gotgenes
Jul 21 '11 at 19:10
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What are the applications of binary trees?
...ware optimised for the hardware where a node is exactly the size of a disk block (say, 512 bytes) and you put as many keys as you can into a single node. The pointers in this case were actually record numbers into a fixed-length-record direct-access file separate from the index file (so record numbe...