opencode uses ~30-50% CPU per process and slows LLM responses to a crawl

[bczsalba]

Again, only happens on my Ubuntu machine. Claude Sonnet 4 with API credentials, didn't use to happen as late as 0.1.172 and definitely was a problem by 0.1.176. I can pinpoint it down further in a few hours if necessary.

Immediately on the compose screen it ramps to around 20-30% CPU usage per process, but I've also seen it as high as 70-90% PP. LLM responses slow down with increased CPU usage too. That part could be throttling on the OS side, but I don't see a reason this machine should have much of a problem running opencode.

[thdxr]

can you check if thi sis happening in in 0.1.190?

[bczsalba]

Yep, seems roughly the same:

(~2s after startup)

Looking at it more it's a bit more interesting - it seems like it "idles" at around 25-35%, and after a few seconds (10 the first time, ~15 the second) it ramps up to around 90-100 per process. It then stays there for a few seconds, before eventually dropping back down to idle in around 2-4s.

Timings don't seem consistent, and I only "time"-d 2 cycles (but I witnessed it ~4 times back to back so it probably is a loop of some sort).

Let me know what else I can do to help!

[bczsalba]

@thdxr seems fixed as of 0.2.5, no clue why (again, lmao). cheers!

[bczsalba]

Actually nevermind, still broken. Not sure why it wasn't that one time.

[bczsalba]

okay it seems fully gone now, i'll make a new issue if it ever comes back since it should be unrelated by then. cheers!