Optipng to reduce PNG files
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I found an open source tool to reduce the size of the images on my site:
optipng.sourceforge.net/
I used it with the Carbonated theme, and reduced the size of the images up to 30%.
Is there any downside to doing this? Why not have every theme optimized this way by default?
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- Andy Miller
- Preeminent Rocketeer
- Posts: 9919
- Thanks: 96
- Web Kahuna
- i actually tried pngcrusher which uses optipng for replicant and it barely made any difference at all.
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- Bob Ateah
- Elite Rocketeer
- Posts: 4521
- Thanks: 0
- Does it do transparent .png files that work in IE?
- The member formerly known as Roland Deschain
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I ran optipng like this in the rt_carbonation/images directory:
optipng -k -o7 *png
It trimmed the total size of images in that directory from 20501 bytes to 16345 bytes, about a 20% savings.
Here are the original sizes:
[simon@buttercup images]$ du -bc *png
321 arrow.png
401 bq_end.png
408 bq_start.png
211 color-blue.png
211 color-green.png
211 color-grey.png
211 color-orange.png
211 color-pink.png
211 color-red.png
511 emailButton.png
1774 head_carbon.png
1423 head_hilite.png
536 head_menu_sep.png
485 head_shad_bl.png
253 head_shad_b.png
484 head_shad_br.png
277 head_shad_l.png
276 head_shad_r.png
214 indent1.png
214 indent2.png
214 indent3.png
214 indent4.png
390 left_bg.png
1130 left_h3_bg.png
457 mbox_shad_bl.png
257 mbox_shad_b.png
457 mbox_shad_br.png
235 mbox_shad_l.png
233 mbox_shad_r.png
393 mbox_shad_tl.png
251 mbox_shad_t.png
440 mbox_shad_tr.png
202 menu_sep.png
411 pdf_button.png
527 printButton.png
430 reflect_l.png
315 reflect_m.png
457 reflect_r.png
399 right_bg.png
1141 right_h3_bg.png
200 tbox_sep.png
461 tbox_shad_bl.png
262 tbox_shad_b.png
466 tbox_shad_br.png
235 tbox_shad_l.png
233 tbox_shad_r.png
436 tbox_shad_tl.png
330 tbox_shad_t.png
482 tbox_shad_tr.png
20501 total
After optipng:
321 arrow.png
359 bq_end.png
408 bq_start.png
211 color-blue.png
211 color-green.png
211 color-grey.png
211 color-orange.png
211 color-pink.png
211 color-red.png
508 emailButton.png
1599 head_carbon.png
1313 head_hilite.png
227 head_menu_sep.png
317 head_shad_bl.png
241 head_shad_b.png
301 head_shad_br.png
204 head_shad_l.png
207 head_shad_r.png
210 indent1.png
210 indent2.png
210 indent3.png
210 indent4.png
263 left_bg.png
617 left_h3_bg.png
315 mbox_shad_bl.png
211 mbox_shad_b.png
306 mbox_shad_br.png
199 mbox_shad_l.png
199 mbox_shad_r.png
303 mbox_shad_tl.png
210 mbox_shad_t.png
324 mbox_shad_tr.png
202 menu_sep.png
410 pdf_button.png
526 printButton.png
340 reflect_l.png
235 reflect_m.png
346 reflect_r.png
265 right_bg.png
619 right_h3_bg.png
200 tbox_sep.png
307 tbox_shad_bl.png
211 tbox_shad_b.png
302 tbox_shad_br.png
199 tbox_shad_l.png
199 tbox_shad_r.png
328 tbox_shad_tl.png
243 tbox_shad_t.png
355 tbox_shad_tr.png
16345 total
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- I haven't tested it with IE, but the claim is that the PNGs produced by optipng should be the same as any other PNG.
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