Variable length types slowness

Hdf-forum archives
1

Hi. Has any progress (even a patchset) been made on this issue? Have
seen a noticable decrease in performance due to this bug.

Thanks.

Hi Francesc,

Thank you for the detailed report. We really appreciate it!

Bug report has been files and we will try to address it promptly.

Elena

> Hi,
>
> I've detected that variable length types works at least 3x slower in HDF5
> 1.8.4 than 1.6.10. After some debugging, the problem seems to be in

line 824

> of src/H5Dio.c (HDF5 1.8.4), i.e.:
>
> {{{
> if(NULL == (type_info->bkg_buf = H5FL_BLK_CALLOC(type_conv,

bkg_size)))

···

On Dec 14, 2009, at 6:00 AM, Francesc Alted wrote:
> }}}
>

2

Hi Christopher,

Hi. Has any progress (even a patchset) been made on this issue?

Not yet, but we hope to fix it in 1.8.5 (mid May 2010).

Elena

···

On Jan 28, 2010, at 1:47 PM, Christopher Hammack wrote:

Have
seen a noticable decrease in performance due to this bug.

Thanks.

Hi Francesc,

Thank you for the detailed report. We really appreciate it!

Bug report has been files and we will try to address it promptly.

Elena
On Dec 14, 2009, at 6:00 AM, Francesc Alted wrote:

Hi,

I've detected that variable length types works at least 3x slower in HDF5
1.8.4 than 1.6.10. After some debugging, the problem seems to be in

line 824

of src/H5Dio.c (HDF5 1.8.4), i.e.:

{{{
  if(NULL == (type_info->bkg_buf = H5FL_BLK_CALLOC(type_conv,

bkg_size)))

}}}

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