Message157861
Mark Dickinson <report@bugs.python.org> wrote:
> In the C version of decimal, do distinct Decimal objects ever share coefficients?
The coefficients are members of the mpd_t struct (libmpdec data type),
and they are not exposed as Python objects or shared.
Cache locality is incredibly important: I have a patch that reserves
a static coefficient of four words inside the PyDecObject. This patch
speeds up _decimal by roughly another 30-40% for regularly sized decimals.
If the decimal grows beyond that, libmpdec automatically switches to
a dynamically allocated coefficient.
I think sharing would probably slow things down a bit. |
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Date |
User |
Action |
Args |
2012-04-09 16:54:38 | skrah | set | recipients:
+ skrah, loewis, mark.dickinson, pitrou |
2012-04-09 16:54:38 | skrah | link | issue14520 messages |
2012-04-09 16:54:38 | skrah | create | |
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