[Xapian-tickets] [Xapian] #785: Use std::string_view whenever possible

[Xapian]

#785: Use std::string_view whenever possible
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 Reporter:  Kronuz       |             Owner:  olly
     Type:  enhancement  |            Status:  new
 Priority:  normal       |         Milestone:
Component:  Other        |           Version:
 Severity:  normal       |        Resolution:
 Keywords:               |        Blocked By:
 Blocking:               |  Operating System:  All
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Comment (by olly):

 The other way to attack this would be from the bottom up - find hot spot
 cases where substrings of `std::string` objects are created or
 `std::string` objects are created from buffers just to pass them to lower-
 level internal functions that require data in a `std::string`.  We almost
 never use `substr()` to make a substring (there are only 8 uses in core if
 you ignore the test suite and development tools), so this means looking
 for places that call `std::string` constructors a lot in profile data.

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Ticket URL: <https://trac.xapian.org/ticket/785#comment:4>
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