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Is there an auto increment in sqlite?
...old & italic are mine):
The AUTOINCREMENT keyword imposes extra CPU, memory, disk space, and
disk I/O overhead and should be avoided if not strictly needed. It is
usually not needed.
In SQLite, a column with type INTEGER PRIMARY KEY is an alias for the
ROWID (except in WITHOUT ROW...
Wait 5 seconds before executing next line
...
So basically you are wasting CPU time. That's not a wait as you are not putting the thread into sleep mode allowing the main processor to focus in other tasks.
– Kyordhel
Jul 6 '17 at 20:25
...
Is cout synchronized/thread-safe?
...ries to call xsputn or whatever. It might depend on how your compiler and CPU decide to reorder memory loads and stores; it would take a careful analysis to be sure. It also depends what your CPU does if two threads try to modify the same location concurrently.
In other words, even if it happens ...
Compile Views in ASP.NET MVC
...it (I find it fine on a large-ish project with 4GB ram and a hyperthreaded CPU) but I easily make back the time I spend waiting for it, and I end up doing fewer operations on my code as R# provides higher level operations that batch together the many steps I'd have to take to achieve the same task m...
Way to read first few lines for pandas dataframe
... pandas as pd
In [2]: time z = pd.read_csv("P00000001-ALL.csv", nrows=20)
CPU times: user 0.00 s, sys: 0.00 s, total: 0.00 s
Wall time: 0.00 s
In [3]: len(z)
Out[3]: 20
In [4]: time z = pd.read_csv("P00000001-ALL.csv")
CPU times: user 27.63 s, sys: 1.92 s, total: 29.55 s
Wall time: 30.23 s
...
'Microsoft.SqlServer.Types' version 10 or higher could not be found on Azure
...a to the web app just for using DbGeography (no thanks) it's also heavy on CPU when using it in SQL Server... taking it out.
– Yovav
Jun 21 '16 at 5:59
13
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pdftk compression option
...okmarks TOC are gone
gs screen:
takes a ridiculously long time and 100% CPU
errors:
sfopen: gs_parse_file_name failed. ?
| ./base/gsicc_manage.c:1651: gsicc_set_device_profile(): cannot find device profile
74.8MB-->10.2MB hideously pixellated
bookmarks ...
Why do x86-64 instructions on 32-bit registers zero the upper part of the full 64-bit register?
... the high half doesn't create a dependency on the previous value, that the CPU would have to wait on. The register renaming mechanism would essentially be defeated if it wasn't done that way.
This way you can write fast code using 32-bit values in 64-bit mode without having to explicitly break depe...
Why does Android use Java? [closed]
...ication thing - this sounds interesting. Correct me if I am wrong, but x86 CPUs have biult in protection via paging and ring modes, therefore application cannot change its page in memory therefore cannot interfere with another app other than using OS API. But does this feature have ARM CPUs? I actua...
_csv.Error: field larger than field limit (131072)
...ue is a C long ([Wikipedia]: C data types), whose size varies depending on CPU architecture and OS (ILP). The classical difference: for a 64bit OS (Python build), the long type size (in bits) is:
Nix: 64
Win: 32
When attempting to set it, the new value is checked to be in the long boundaries, th...