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Full Discussion: Moving XML tag/contents after specific XML tag within same file
Top Forums Shell Programming and Scripting Moving XML tag/contents after specific XML tag within same file Post 303021766 by Peasant on Thursday 16th of August 2018 11:05:17 AM
Old 08-16-2018
As a systems guy, i would always choose awk, if possible.
Not perhaps for parsing xml...

Examine the strace -c <code> reports :
For awk :
Code:
% time     seconds  usecs/call     calls    errors syscall
------ ----------- ----------- --------- --------- ----------------
 27.26    0.000558          13        42           write
 18.61    0.000381          21        18           read
 11.87    0.000243          16        15           openat
  5.72    0.000117          39         3           munmap
  5.28    0.000108           5        20           fstat
  4.49    0.000092          46         2           lseek
  4.35    0.000089           3        26           mmap
  4.25    0.000087          15         6           brk
  3.71    0.000076           5        15           close
  3.13    0.000064          64         1           stat
  2.54    0.000052          10         5           rt_sigaction
  2.00    0.000041           2        18           mprotect
  1.91    0.000039           7         6           fcntl
  1.27    0.000026           9         3         2 ioctl
  0.73    0.000015           8         2           getgroups
  0.44    0.000009           9         1           sigaltstack
  0.39    0.000008           8         1           getpgrp
  0.34    0.000007           7         1           getpid
  0.34    0.000007           7         1           getuid
  0.34    0.000007           7         1           getgid
  0.34    0.000007           7         1           geteuid
  0.34    0.000007           7         1           getegid
  0.34    0.000007           7         1           getppid
  0.00    0.000000           0        10        10 access
  0.00    0.000000           0         1           execve
  0.00    0.000000           0         1           arch_prctl
------ ----------- ----------- --------- --------- ----------------
100.00    0.002047                   202        12 total

And for ruby :
Code:
% time     seconds  usecs/call     calls    errors syscall
------ ----------- ----------- --------- --------- ----------------
 37.68    0.003260           7       459       320 openat
 18.30    0.001583           4       361         7 lstat
 12.39    0.001072           6       186           read
  6.60    0.000571           4       141           close
  4.91    0.000425           3       141           fstat
  2.84    0.000246           3        76         1 stat
  2.53    0.000219           3        74        71 ioctl
  2.35    0.000203           3        61           fcntl
  2.24    0.000194           4        47           getegid
  2.09    0.000181           5        38           brk
  1.83    0.000158           3        46           getgid
  1.68    0.000145           3        46           getuid
  1.41    0.000122           3        47           geteuid
  1.33    0.000115          19         6           getdents
  0.89    0.000077           2        38           mmap
  0.47    0.000041           2        27           mprotect
  0.43    0.000037           2        24           lseek
  0.02    0.000002           2         1           sysinfo
  0.00    0.000000           0         5           write
  0.00    0.000000           0         4           munmap
  0.00    0.000000           0        18           rt_sigaction
  0.00    0.000000           0         3           rt_sigprocmask
  0.00    0.000000           0        12        12 access
  0.00    0.000000           0         3           getpid
  0.00    0.000000           0         1           clone
  0.00    0.000000           0         3         1 execve
  0.00    0.000000           0         1           getcwd
  0.00    0.000000           0         1           sigaltstack
  0.00    0.000000           0         2           arch_prctl
  0.00    0.000000           0         1           futex
  0.00    0.000000           0         1           sched_getaffinity
  0.00    0.000000           0         1           set_tid_address
  0.00    0.000000           0         1           clock_gettime
  0.00    0.000000           0         1           set_robust_list
  0.00    0.000000           0         2           pipe2
  0.00    0.000000           0         3           prlimit64
  0.00    0.000000           0         2           getrandom
------ ----------- ----------- --------- --------- ----------------
100.00    0.008651                  1884       412 total

The difference will not be noticed on a system when parsing one file.
But in a situation where you need to parse tens of thousands ...

Possibly the ruby code can be written to do it better, but doubtful it will ever surpass awk code in performance.
This is to say if two ideal coders write a program in ruby and awk to do one thing best it can and start forking it Smilie

So, to conclude, in my opinion higher level languages are to be used in situations where your program needs many libraries to ease up the job - connect to multiple API endpoints, databases, versioning systems, complex math and such.

You could do all that in awk, but tremendous effort will be required and will beat the propose of short programs which do one thing quick and efficient.

This is just my rant Smilie
Regards
Peasant.
These 3 Users Gave Thanks to Peasant For This Post:
RudiC stomp vgersh99
 

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