the same picture on a Linux Server with gv needs also only few seconds.
test.ps.gz [^] (162,809 bytes) 2010-03-23 13:30 | Anonymous | Login | 2024-04-28 22:09 CEST |
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| ID | Category | Severity | Reproducibility | Date Submitted | Last Update | ||
| 0004368 | [gv] regular use | tweak | always | 2010-03-23 13:30 | 2011-01-20 11:04 | ||
| Reporter | wcohrs | View Status | public | ||||
| Assigned To | james | ||||||
| Priority | normal | Resolution | no change required | ||||
| Status | closed | ||||||
| Summary | 0004368: gv very slow | ||||||
| Description |
gv is very slow SPARC and x86 on a Server with Quad-Core AMD Opteron(tm) Processor 8380 2500MHz needs gv several minutes but gs needs only few seconds. the same picture on a Linux Server with gv needs also only few seconds. |
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| Tags | No tags attached. | ||||||
| Attached Files |
test.ps.gz [^] (162,809 bytes) 2010-03-23 13:30 |
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(0007730) james (manager) 2010-03-23 15:46 |
The anti-alias device used in gv is what is making gv slower. Turn off anti aliasing and see the difference. Simulate the effect directly with Ghostscript: gs -sDEVICE=x11alpha test.ps Try alternate aliasing: gs -dGraphicsAlphaBits=1 -dTextAlphaBits=1 test.ps gs -dGraphicsAlphaBits=2 -dTextAlphaBits=2 test.ps gs -dGraphicsAlphaBits=4 -dTextAlphaBits=4 test.ps You can set the gs parameters in gv. The underlying problem is the Postscript itself, it just slow. It's plotting dots by drawing zero length lines with the linecap set to round. Try the dot or as procedure, gylph or similarly cached bit map, user path or form. Even then, it's plotting the dots over each other, I expect the whole thing can be improved but decide if you want to spend time writing a better prologue, time writing better output, or spend time waiting for the Postscript interpreter. |
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(0008661) james (manager) 2011-01-04 10:29 |
Closing as the underlying slowness is the with the GS parameter which is settable in GV. |
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