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Using global variables in a function
...code)
3 0 LOAD_CONST 1 (5)
3 STORE_FAST 0 (baz)
4 6 LOAD_GLOBAL 0 (bar)
9 PRINT_ITEM
10 PRINT_NEWLINE
5 11 LOAD_FAST 0 (baz)
14 PRINT_IT...
JavaScript data grid for millions of rows [closed]
...ut the scrolling itself is done by the browser. That allows it to be very fast yet smooth (onscroll events are notoriously slow). The caveat is that there are bugs/limits in the browsers' CSS engines that limit the potential height of an element. For IE, that happens to be 0x123456 or 1193046 pix...
MySQL maximum memory usage
...lf.
Hardware
The hardware is the obvious part. The more RAM the merrier, faster disks ftw. Don't believe those monthly or weekly news letters though. MySQL doesn't scale linear - not even on Oracle hardware. It's a little trickier than that.
The bottom line is: there is no general rule of thumb f...
Git 工具 - 子模块(submodule)：一个仓库包含另一个仓库 - 开源 & Github -...
... -> origin/master
$ git merge origin/master
Updating c3f01dc..d0354fc
Fast-forward
scripts/connect.sh | 1 +
src/db.c | 1 +
2 files changed, 2 insertions(+)
如果你现在返回到主项目并运行 git diff --submodule，就会看到子模块被更新的同时获得了...
jQuery Scroll To bottom of the page
..."click", function () {
$('html, body').animate({ scrollTop:3031 },"fast");
return false;
});
This solution worked for me. It is working in Page Scroll Down fastly.
share
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improv...
What are the differences between a HashMap and a Hashtable in Java?
...
1) HashMap's iterators are NOT fail-safe. They are fail-fast. There is a huge difference in meaning between those two terms. 2) There is no set operation on a HashMap. 3) The put(...) operation won't throw IllegalArgumentException if there was a previous change. 4) The fail-fa...
Why were pandas merges in python faster than data.table merges in R in 2012?
...das library for python, which according to this benchmark performs very fast in-memory merges. It's even faster than the data.table package in R (my language of choice for analysis).
...
PyPy — How can it possibly beat CPython?
...cific assembly code after running for a while, I imagine it would be quite faster than CPython.
Update: Recently, on a carefully crafted example, PyPy outperformed a similar C program compiled with gcc -O3. It's a contrived case but does exhibit some ideas.
Q4. Why would anyone try something like...
What is the performance of Objects/Arrays in JavaScript? (specifically for Google V8)
...tails on my blog regarding this.
The summary is as followed
V8 Array is Fast, VERY FAST
Array push / pop / shift is ~approx 20x+ faster than any object equivalent.
Surprisingly Array.shift() is fast ~approx 6x slower than an array pop, but is ~approx 100x faster than an object attribute deletion...
What algorithms compute directions from point A to point B on a map?
... aid in making a better admissible heuristic, and therefore making A* work faster.
– a1kmm
Nov 3 '09 at 1:02
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