Performance of loop
| От | Gnanavel S |
|---|---|
| Тема | Performance of loop |
| Дата | |
| Msg-id | eec3b03c050427205669495af0@mail.gmail.com обсуждение исходный текст |
| Ответы |
Re: Performance of loop
|
| Список | pgsql-jdbc |
Hi,
First of all, I would like to thank the postgresql team for providing this wonderful product.
Coming to the point, in postgresql jdbc driver coding, I saw many inefficient "for" loops. For eg in V2Query.class file
While parsing the parameterized query, there is a "for" loop as this
for (int i = 0; i < query.length(); ++i)
{
char c = query.charAt(i);
....
.....
}
In the above coding, say if the length of the query is 1000 characters then the query.length() is evaluated 1000 times there by reducing the performance.
I think the loop can be rewritten as
for (int i = 0,c=query.length(); i < c; ++i)
{
char c = query.charAt(i);
....
.....
}
with regards,
S.Gnanavel
Software Engineer
Satyam Computer Services Ltd
First of all, I would like to thank the postgresql team for providing this wonderful product.
Coming to the point, in postgresql jdbc driver coding, I saw many inefficient "for" loops. For eg in V2Query.class file
While parsing the parameterized query, there is a "for" loop as this
for (int i = 0; i < query.length(); ++i)
{
char c = query.charAt(i);
....
.....
}
In the above coding, say if the length of the query is 1000 characters then the query.length() is evaluated 1000 times there by reducing the performance.
I think the loop can be rewritten as
for (int i = 0,c=query.length(); i < c; ++i)
{
char c = query.charAt(i);
....
.....
}
with regards,
S.Gnanavel
Software Engineer
Satyam Computer Services Ltd
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