Downthrottle to 16Hz on multi-feed charts
parent
a4e6014247
commit
f1adad90a6
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@ -1058,17 +1058,28 @@ async def display_symbol_data(
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display_rate = main_window().current_screen().refreshRate()
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_quote_throttle_rate = floor(display_rate) - 6
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# TODO: we should be able to increase this if we use some
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# `mypyc` speedups elsewhere? 22ish seems to be the sweet
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# spot for single-feed chart.
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num_of_feeds = len(fqsns)
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mx: int = 22
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if num_of_feeds > 1:
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# there will be more ctx switches with more than 1 feed so we
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# max throttle down a bit more.
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mx = 16
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# limit to at least display's FPS
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# avoiding needless Qt-in-guest-mode context switches
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cycles_per_feed = min(
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round(_quote_throttle_rate/num_of_feeds),
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mx,
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)
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feed: Feed
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async with open_feed(
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fqsns,
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loglevel=loglevel,
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# limit to at least display's FPS
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# avoiding needless Qt-in-guest-mode context switches
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tick_throttle=min(
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round(_quote_throttle_rate/len(fqsns)),
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22, # aka 6 + 16
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),
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tick_throttle=cycles_per_feed,
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) as feed:
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