Re: [PATCH] Custom code int(32|64) => text conversions out of performance reasons
| От | Robert Haas |
|---|---|
| Тема | Re: [PATCH] Custom code int(32|64) => text conversions out of performance reasons |
| Дата | |
| Msg-id | AANLkTik4QXhrgkv_K+5+hDakRcasWF3eGOmmagxm8FTw@mail.gmail.com обсуждение исходный текст |
| Ответ на | Re: [PATCH] Custom code int(32|64) => text conversions out of performance reasons (Robert Haas <robertmhaas@gmail.com>) |
| Ответы |
Re: [PATCH] Custom code int(32|64) => text conversions out of performance reasons
|
| Список | pgsql-hackers |
On Fri, Nov 19, 2010 at 10:18 PM, Robert Haas <robertmhaas@gmail.com> wrote: > Sure thing. Thanks for taking time to do this - very nice speedup. > This part now committed, too. It occurs to me belatedly that there might be a better way to do this.Instead of flipping value from negative to positive,with a special case for the smallest possible integer, we could do it the other round. And actually, I think we can rid of neg, too. if (value < 0) *a++ = '-'; else value = -value; start = a; Then we could just adjust the calculation of the actual digit. *a++ = '0' + (-remainder); Good idea? Bad idea? Seems cleaner to me, assuming it'll actually work... -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company
В списке pgsql-hackers по дате отправления: