# openlane

Amr Gouhar

03/03/2021, 7:31 PM
Hi all, I thought you might be interested in this. I've run a couple of experiments with OpenLane & Sky130: 1. ADDER_TYPE comparison. 2. Resizer Vs OpenPhySyn comparison. 3. Synthesis Strategies comparison. I'm sharing the results here: I'll be conducting more experiments over time and adding them to the same spreadsheets.
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Anton Blanchard

03/05/2021, 8:03 PM
Nice work @Amr Gouhar! Lots of interesting stuff to look into. I'm guessing this wasn't using the
branch, and even if it was, it doesn't have the recent resizer fix
It could be interesting to look at OpenPhySyn vs Resizer with that (might be another issue or two we need to find in the Resizer)
Most of the FA/FCA/yosys adder tests matched what I saw: • RCA has less area but much worse timing than RCA and yosys (expected) • FA and yosys are similar in terms of timing (expected) • FA has a little less area than yosys (expected)
There are a few unexpected things in there, eg
where RCA has much better wns than FA or yosys