[BUG] Performance of track is significantly worse than spinner #3859
Description
- I've checked docs and closed issues for possible solutions.
- I can't find my issue in the FAQ.
Describe the bug
track performance is significantly worse than spinner
import time
from rich.progress import track
from rich.console import Console
console = Console()
_start = time.perf_counter()
with console.status("some status", spinner="dots"):
for _ in range(10_000_000):
pass
print(f"Time elapsed for spinner: {time.perf_counter() - _start} s", flush=True)
_start = time.perf_counter()
for _ in track(range(10_000_000), transient=True):
pass
print(f"Time elapsed for track: {time.perf_counter() - _start} s", flush=True)
# In my system this is 3x slower for progress than spinnerI understand there may be performance differences between the two, but such a wide gap makes me suspicious. If you are aware of this performance difference feel free to close the issue.
Platform
Linux, using GNOME Terminal 3.52
Rich features
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sit amet, sit amet, sit amet, sit amet,
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adipiscing elit. adipiscing elit. adipiscing elit. adipiscing elit.
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at justo. Maecenas at justo. Maecenas a at justo. Maecenas luctus
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───────────────────────────────────────────────────────────────────────────────
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phantom Menace
Syntax 1 def iter_last(values: Iterable[T]) {
highlighting 2 │ """Iterate and generate a tupl │ 'foo': [
& 3 │ iter_values = iter(values) │ │ 3.1427,
pretty 4 │ try: │ │ (
printing 5 │ │ previous_value = next(iter │ │ │ 'Paul Atreides',
6 │ except StopIteration: │ │ │ 'Vladimir Harkonnen',
7 │ │ return │ │ │ 'Thufir Hawat'
8 │ for value in iter_values: │ │ )
9 │ │ yield False, previous_valu │ ],
10 │ │ previous_value = value │ 'atomic': (False, True, None)
11 │ yield True, previous_value }
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