Tests Windows 7 i7 by Skjorn

Test data: PSD with 128 layers 1600x1066 (627 MB file)
Machine: Windows 7, Intel Core i7 CPU 3.4 GHz, 4 GB DDR3 RAM, SATA hard drive 7200 rpm 32 MB cache

Photoshop CS2

Built-in script

Flavour	Export format	Time	Speed-up
All layers	PSD	24:02.68	--
All layers	TGA (24 bit)	01:11.08	--
All layers	JPG (quality 12)	01:20.37	--

Note: PNG export not supported by the built-in script in CS2.

Original script (February 12, 2014)

Flavour	Export format	Time	Speed-up
All layers	PNG (24 bit)	04:57.65	--
All layers	JPG (quality 12)	00:41.11	1.95

Tagged 'skjorn' (June 20, 2014)

Flavour	Export format	Time	Speed-up vs. built-in	Speed-up vs. original
All layers	TGA (24 bit)	00:17.05	4.17	--
Visible layers only	TGA (24 bit)	00:18.00	3.95	--
All layers	PNG (24 bit)	03:56.49	--	1.26
All layers	JPG (quality 12)	00:26.77	3.00	1.54

With progress bars, tagged 'progress_bars' (June 23, 2014)

Flavour	Export format	Time	Speed-up vs. built-in	Speed-up vs. last release
All layers	TGA (24 bit)	00:20.35	3.49	0.84 (slower)
Visible layers only	TGA (24 bit)	00:19.23	3.70	0.94 (slower)
All layers	PNG (24 bit)	03:55.36	--	1.00
All layers	JPG (quality 12)	00:31.01	2.59	0.86 (slower)

Photoshop CC 2014

Built-in script

Flavour	Export format	Time	Speed-up
All layers	TGA (24 bit)	01:31.00	--
All layers	JPG (quality 12)	01:28.71	--
All layers	PNG (24 bit)	31:36.83	--

Tagged 'skjorn' (June 20, 2014)

Flavour	Export format	Time	Speed-up
All layers	TGA (24 bit)	00:19.49	4.67
Visible layers only	TGA (24 bit)	00:22.93	3.97
All layers	JPG (quality 12)	00:45.03	1.97
All layers	PNG (24 bit)	04:15.77	7.42