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⚡️ Speed up function _get_timeline_plot by 10% #143

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⚡️ Speed up function _get_timeline_plot by 10% #143

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3 changes: 2 additions & 1 deletion optuna/visualization/matplotlib/_timeline.py
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Original file line number Diff line number Diff line change
Expand Up @@ -90,8 +90,9 @@ def _get_timeline_plot(info: _TimelineInfo) -> "Axes":
# There are 5 types of TrialState in total.
# However, the legend depicts only types present in the arguments.
legend_handles = []
present_state_names = set(_get_state_name(b) for b in info.bars)
for state_name, color in _cm.items():
if any(_get_state_name(b) == state_name for b in info.bars):
if state_name in present_state_names:
legend_handles.append(matplotlib.patches.Patch(color=color, label=state_name))
ax.legend(handles=legend_handles, loc="upper left", bbox_to_anchor=(1.05, 1.0))
fig.tight_layout()
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