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MPG Table of Contents   Page 1: Introduction Page 2: Maximum Memory on Mac Pro, MacBook Pro, iMac Page 3: Cache Tile Size = Sharp Stick In The Eye Page 4: 64-bit and 32-bit Plugin Issues Page 5: Adobe Plugins for CS5 Performance Page 6: Warmup Time — Memory Allocation Hit Page 7: Scripts to Warm Up Photoshop CS5 Page 8: Analysis of CPU Core Usage Page 9: Various Other Photoshop CS5 Issues Page 10: diglloyd Benchmarks Page 11: Conclusions

Optimizing Photoshop CS5 — Plugins 64-bit / 32-bit

Like the program itself, plugins must be 32-bit or 64-bit, to work with a 32-bit or 64-bit Photoshop CS5.

Many 3rd-party plugins are not yet 64-bit, which means they won’t run at all in CS5 in 64-bit mode.

The workaround is to use CS5 in 32-bit mode (see below), but there is a downside: unlike Photoshop CS4 which could use up to 3072MB memory, CS5 limits itself to 2100MB. This limitation is fine for moderate size files, but will be a performance hit for large files.

If you’re a 3rd-party plugin user, stick with Photoshop CS4 until the plugin issue resolves (by vendors releasing 64-bit version).

You can run both Photoshop CS4 and CS5.