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How to profile a bash shell script slow startup?
... you'd like to begin a trace in any Bash script):
PS4='+ $(date "+%s.%N")\011 '
exec 3>&2 2>/tmp/bashstart.$$.log
set -x
add
set +x
exec 2>&3 3>&-
at the end of ~/.bashrc (or at the end of the section of any Bash script you'd like tracing to stop). The \011 is an octal ...
Why should I use a pointer rather than the object itself?
... RAII)
– Manu343726
Mar 3 '14 at 23:01
11
...
Export database schema into SQL file
...
answered Apr 11 '16 at 16:01
Manuel RuizManuel Ruiz
12111 silver badge33 bronze badges
...
File I/O in Every Programming Language [closed]
...RGANIZATION IS LINE SEQUENTIAL.
DATA DIVISION.
FILE SECTION.
FD TestFile.
01 TestData.
02 LineNum PIC X.
02 LineText PIC X(72).
PROCEDURE DIVISION.
Begin.
OPEN OUTPUT TestFile
DISPLAY "This language is still around."
PERFORM GetFileDetails
PERFORM UNTIL TestDa...
Cartesian product of x and y array points into single array of 2D points
...ev. of 7 runs, 10000 loops each)
cartesian_product_recursive:
215 µs ± 6.01 µs per loop (mean ± std. dev. of 7 runs, 1000 loops each)
cartesian_product_itertools:
3.65 ms ± 38.7 µs per loop (mean ± std. dev. of 7 runs, 100 loops each)
In [3]: test_all(*(x500 * 2))
repeat_product:
1.31 ms ± ...
How to sort my paws?
...
# Trim off any "blank" edges around the paw...
mask = paw > 0.01 * paw.max()
y, x = np.mgrid[:ny, :nx]
ymin, ymax = y[mask].min(), y[mask].max()
xmin, xmax = x[mask].min(), x[mask].max()
# Make a 20x20 grid to resample the paw pressure values onto
numx, numy = 20, 2...
In what order are Panels the most efficient in terms of render time and performance?
...
answered Apr 3 '12 at 15:01
ErickErick
47822 silver badges1212 bronze badges
...
Why does the C preprocessor interpret the word “linux” as the constant “1”?
...vantage of the predefined unix macro:
main() { printf(&unix["\021%six\012\0"],(unix)["have"]+"fun"-0x60);}
It prints "unix", but for reasons that have absolutely nothing to do with the spelling of the macro name.
shar...
Fastest exit strategy for a Panic Button in Crisis/Abuse Websites? [closed]
...ut)
– NicolasMoise
Mar 26 '14 at 14:01
2
I do like the idea that the history can be covered up au...
Why does struct alignment depend on whether a field type is primitive or user-defined?
....
– Michael Stum♦
Jul 15 '14 at 7:01
@Soner no it does not fix it. Did you put the Layout on both fields to be offse...