Although 2015.02.05 seems faster at compiling and rendering the preview it seems much less responsive after that. The GUI is barely usable when a large model is loaded. Older versions such as 2013.06 are much better in that respect. Is this expected or a bug / regression?

There was a rendering bug fixed that slowed down the preview in the process. -- View this message in context: http://forum.openscad.org/2015-02-05-less-responsive-tp11580p11581.html Sent from the OpenSCAD mailing list archive at Nabble.com.

On Feb 9, 2015, at 12:25 PM, nop head <nop.head@gmail.com> wrote: > Although 2015.02.05 seems faster at compiling and rendering the preview it seems much less responsive after that. The GUI is barely usable when a large model is loaded. Older versions such as 2013.06 are much better in that respect. > > Is this expected or a bug / regression? Could you point to an example, so I can make some tests? We generally try to avoid performance regressions. In particular for previews. We did end up with some lower performance in a few places due to the need to triangulate almost planar faces. That would introduce a slight function call overhead while rendering. -Marius

I noticed it rendering Mendel90. You could download it from git and open scad/main.scad and press F5. It seems to take about 5 seconds to render a frame when you drag with the mouse. 2013.06 takes about 1 second. That still seems poor when most objects have render() statements in them, so should just be a mesh to draw. On 9 February 2015 at 22:12, Marius Kintel <marius@kintel.net> wrote: > On Feb 9, 2015, at 12:25 PM, nop head <nop.head@gmail.com> wrote: > > > Although 2015.02.05 seems faster at compiling and rendering the preview > it seems much less responsive after that. The GUI is barely usable when a > large model is loaded. Older versions such as 2013.06 are much better in > that respect. > > > > Is this expected or a bug / regression? > > Could you point to an example, so I can make some tests? > > We generally try to avoid performance regressions. In particular for > previews. > We did end up with some lower performance in a few places due to the need > to triangulate almost planar faces. That would introduce a slight function > call overhead while rendering. > > -Marius > > > _______________________________________________ > OpenSCAD mailing list > Discuss@lists.openscad.org > http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org >

Even a relatively simple design with only four render()ed parts chugs at about one frame per second whereas it pans and rotates in real time with the old version. On 11 February 2015 at 11:35, nop head <nop.head@gmail.com> wrote: > I noticed it rendering Mendel90. You could download it from git and open > scad/main.scad and press F5. > > It seems to take about 5 seconds to render a frame when you drag with the > mouse. 2013.06 takes about 1 second. That still seems poor when most > objects have render() statements in them, so should just be a mesh to draw. > > On 9 February 2015 at 22:12, Marius Kintel <marius@kintel.net> wrote: > >> On Feb 9, 2015, at 12:25 PM, nop head <nop.head@gmail.com> wrote: >> >> > Although 2015.02.05 seems faster at compiling and rendering the preview >> it seems much less responsive after that. The GUI is barely usable when a >> large model is loaded. Older versions such as 2013.06 are much better in >> that respect. >> > >> > Is this expected or a bug / regression? >> >> Could you point to an example, so I can make some tests? >> >> We generally try to avoid performance regressions. In particular for >> previews. >> We did end up with some lower performance in a few places due to the need >> to triangulate almost planar faces. That would introduce a slight function >> call overhead while rendering. >> >> -Marius >> >> >> _______________________________________________ >> OpenSCAD mailing list >> Discuss@lists.openscad.org >> http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org >> > >

An odd thing I noticed is OpenScad seems to use about 80% of one core even when it is minimised and doing nothing. This is true of both the old and the new version. Also I am not sure the problem is simply slow drawing. If I drag the mouse continuously is seems to draw a short burst of frames rapidly and then pause for nearly a second and then repeat. It seems like it spends most of the time doing something else. The old version will draw contiguously if I move the mouse continuously and that revs up the graphics card fan. The new one doesn't spend enough time drawing to do that. On 11 February 2015 at 14:13, nop head <nop.head@gmail.com> wrote: > Even a relatively simple design with only four render()ed parts chugs at > about one frame per second whereas it pans and rotates in real time with > the old version. > > > > > On 11 February 2015 at 11:35, nop head <nop.head@gmail.com> wrote: > >> I noticed it rendering Mendel90. You could download it from git and open >> scad/main.scad and press F5. >> >> It seems to take about 5 seconds to render a frame when you drag with the >> mouse. 2013.06 takes about 1 second. That still seems poor when most >> objects have render() statements in them, so should just be a mesh to draw. >> >> On 9 February 2015 at 22:12, Marius Kintel <marius@kintel.net> wrote: >> >>> On Feb 9, 2015, at 12:25 PM, nop head <nop.head@gmail.com> wrote: >>> >>> > Although 2015.02.05 seems faster at compiling and rendering the >>> preview it seems much less responsive after that. The GUI is barely usable >>> when a large model is loaded. Older versions such as 2013.06 are much >>> better in that respect. >>> > >>> > Is this expected or a bug / regression? >>> >>> Could you point to an example, so I can make some tests? >>> >>> We generally try to avoid performance regressions. In particular for >>> previews. >>> We did end up with some lower performance in a few places due to the >>> need to triangulate almost planar faces. That would introduce a slight >>> function call overhead while rendering. >>> >>> -Marius >>> >>> >>> _______________________________________________ >>> OpenSCAD mailing list >>> Discuss@lists.openscad.org >>> http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org >>> >> >> >

On Feb 11, 2015, at 09:13 AM, nop head <nop.head@gmail.com> wrote: > Even a relatively simple design with only four render()ed parts chugs at about one frame per second whereas it pans and rotates in real time with the old version. > That doesn’t looks like a Mendel90 part. Could you share that design? -Marius

On 02/11/2015 06:54 AM, nop head wrote: > An odd thing I noticed is OpenScad seems to use about 80% of one core > even when it is minimised and doing nothing. This is true of both the > old and the new version. hi, if the design for the image that is shown is not proprietary, could you please post the .scad? i'd like to see what it is that you are doing... thanks! yvette

Not easily because it has lots of dependencies but the render in short bursts issue seems to be any part of Mendel90. For example bar-clamps.scad does it. On 11 February 2015 at 16:25, Marius Kintel <marius@kintel.net> wrote: > On Feb 11, 2015, at 09:13 AM, nop head <nop.head@gmail.com> wrote: > > > Even a relatively simple design with only four render()ed parts chugs at > about one frame per second whereas it pans and rotates in real time with > the old version. > > > That doesn't looks like a Mendel90 part. Could you share that design? > > -Marius > > > _______________________________________________ > OpenSCAD mailing list > Discuss@lists.openscad.org > http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org >

Turning off automatic reload seems to fix the pausing issue. On 11 February 2015 at 16:31, nop head <nop.head@gmail.com> wrote: > Not easily because it has lots of dependencies but the render in short > bursts issue seems to be any part of Mendel90. For example bar-clamps.scad > does it. > > On 11 February 2015 at 16:25, Marius Kintel <marius@kintel.net> wrote: > >> On Feb 11, 2015, at 09:13 AM, nop head <nop.head@gmail.com> wrote: >> >> > Even a relatively simple design with only four render()ed parts chugs >> at about one frame per second whereas it pans and rotates in real time with >> the old version. >> > >> That doesn't looks like a Mendel90 part. Could you share that design? >> >> -Marius >> >> >> _______________________________________________ >> OpenSCAD mailing list >> Discuss@lists.openscad.org >> http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org >> > >