Thank you for purchasing through links and ads on this site.
OWC / MacSales.com...
diglloyd Deal Finder...
Buy other stuff at Amazon.com...
Get up to 16x more storage and 2x the speeds of the original drive
Handpicked deals...
$390 $270
SAVE $120

$1798 $1598
SAVE $200

$3297 $2797
SAVE $500

$3397 $2797
SAVE $600

$150 $90
SAVE $60

$1398 $898
SAVE $500

$3698 $2998
SAVE $700

$2998 $2498
SAVE $500

$1799 $1299
SAVE $500

$1999 $1199
SAVE $800

$2299 $1599
SAVE $700

$2399 $2049
SAVE $350

$2799 $2399
SAVE $400

$2799 $1899
SAVE $900

$1199 $920
SAVE $279

$1349 $1049
SAVE $300

$997 $897
SAVE $100

$2099 $1699
SAVE $400

$1999 $1349
SAVE $650

$1999 $1599
SAVE $400

$1999 $1999
SAVE $0

$1329 $929
SAVE $400

$4499 $3999
SAVE $500

$329 $329
SAVE $0

$1499 $999
SAVE $500

$1499 $1289
SAVE $210

$2199 $1999
SAVE $200

$3399 $2199
SAVE $1200

$2468 $1768
SAVE $700

Optimizing PTGui Pro Panoramas

Last updated 2011-01-05 - Send Feedback
Related: how-to, Mac Pro, memory, optimization, panorama, RAID, RAID-0, software, SSD

As of September 2010, PTGui Pro 8.3.10 is still a 32-bit application, which means that it can directly access at most 2.5GB of memory— far too little for larger panoramas, which demand a lot of memory for computing them (CS5 uses 10GB on the test used for this analysis). As a result, PTGui spends an inordinate amount of time reading to and writing from the drive.

The graph below shows render time to assemble eight 21-megapixel 16-bit TIF files into a panorama.

  • For each test, I rebooted the machine, then immediately ran the test.
  • Test machine was the 2010 Mac Pro 3.33GHz 6-core, with 24GB memory, except that triple SSD and RAM disk test used the 12-core 3.33GHz Mac Pro (to allow more memory). Times were about the same for the 6-core and 12-core Mac Pro using a dual-SSD system.
  • PTGui was set to use all hardware (not virtual) CPU cores and 100% of available memory (which is not much for a 32-bit app, it uses only about 1.75GB for this test).
  • This test generates a 86-megapixel output file (347MB) from nine 21MPCanon 5D Mark II images, a relatively small job as such things go. PTGui needed 27GB of temporary space.

Not just any SSD will do; be sure to get one that is as fast as the OWC Mercury Pro Extreme RE, and suitable for RAID-0 striping e.g., not Apple’s SSD offering. Alternately, 3 or 4 fast hard drives in a RAID-0 stripe are also excellent.

A RAM Disk used for temporary space has a major performance impact, and allows more CPU cores to be used than with a slower drive.

To use a RAM Disk effectively:

  • Boot into the 64-bit kernel (the default with 2010 Mac Pros).
  • Install plenty of RAM; 32GB should be considered a minimum, because PTGui consumes huge amounts of temporary (27GB for this modest-size panorama of 86MP).
  • Get a Mac Pro with 8 memory slots (8-core and 12-core models), which allows 64GB of memory. The 4/6-core models max-out at 32GB.
  • Set the RAM disk as the first scratch drive for PTGui. Use a triple-SSD RAID-0 stripe for overflow.
Performance with different scratch drives

Scratch drive

Put the scratch folder on your fastest drive.

Scratch drive preference for PTGui Pro

Preferences

For 2010 Mac Pro 3.33GHz 6-core, with 24GB memory.

Note that PTGui doesn't use more than about 4 cores effectively.

Settings used for testing on a hexacore Mac Pro
Output settings that were used for testing
Apple iMac 5K Speed Demon
$3849
$3499

It rocks! What Lloyd uses every day, best upgrade in many years!

SMART MOVES:
• Add 128GB or 64GB memory
fast SSD storage
Thunderbolt storage

√ B&H Photo PAYS THE SALES TAX FOR YOU More info...
Apple 13-inch MacBook Pro
Only $1799 $1149

8GB / 256GB SSD / 2.3 Ghz Intel Core i5

Apple Refurbished Factory Sealed
Apple 1 Year Limited Warranty
Awesome for a student!
View all handpicked deals...

Samsung 2TB T5 Portable Solid-State Drive (Black)
$390 $270
SAVE $120

diglloyd.com | Terms of Use | PRIVACY POLICY
Contact | About Lloyd Chambers | Consulting | Photo Tours
Mailing Lists | RSS Feeds | Twitter
Copyright © 2019 diglloyd Inc, all rights reserved.
Display info: __RETINA_INFO_STATUS__