Re: [gobo-eiffel-develop] Memory allocation overhead

[Lothar S. <ll...@we...>]

Hello Colin,

Friday, March 28, 2008, 7:50:06 PM, you wrote:

>>>>>> "Eric" == Eric Bezault <er...@go...> writes:

CPA>     Eric> Otherwise I try to be very careful with
CPA>     Eric> strings. String concatenations and substring operations
CPA>     Eric> create a lot of intermediary objects. Be careful as well
CPA>     Eric> when strings get resized (even implicitly by some
CPA>     Eric> operations).

CPA> Is there a more efficient way of doing this sort of thing?

CPA>    a_preceding_path := parent.path
CPA>     if STRING_.same_string (a_preceding_path, "/") then
CPA>         Result := STRING_.concat (a_preceding_path, node_name)
CPA>     else
CPA>         Result := STRING_.concat (a_preceding_path, "/")
CPA>         Result := STRING_.appended_string (Result, node_name)
CPA>         Result := STRING_.appended_string (Result, "[")
CPA>         Result := STRING_.appended_string (Result, simple_number)
CPA>         Result := STRING_.appended_string (Result, "]")
CPA>     end

Exactly for this reason some java compilers have a special optimization
inside the code generator when it detects sequences of strings
concatenations. It's just a to important operation.


-- 
Best regards,
 Lothar                            mailto:ll...@we...