I'm struggling to convert a duration in format  HH:MM:SS.NNNNNNN  to seconds in a concise manner. 
 For example,  01:03:01.8231963  should convert to 97381.8231963 seconds. 
 The convert function dur2sec supports the format [D+]HH:MM:SS while the mstime function supports the format [MM:]SS.SSS however there isn't a single function to support my format. 
 I've come up with the following solution where cputime is the field I am trying to convert, however, it feels like there should be a simpler way. 
  | rex field=cputime "(?<cputime_s>\d+\:\d+\:\d+)(?<cputime_ms>\.\d+)" 
| convert dur2sec(cputime_s) 
| eval cputime_s=cputime_s+tonumber(cputime_ms) 
  
						
					
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