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bm_points.py
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bm_points.py
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import numpy as np
import pygfx as gfx
from _benchmark import benchmark, run_all
rng = np.random.default_rng()
# An option to add 5 clipping planes to ensure that the clipping code is not
# too slow
five_clipping_planes = rng.random((5, 4), dtype="float32").tolist()
# Twenty should exagerate the clipping code, though it is unclear if it is
# representative of real workloads
twenty_clipping_planes = rng.random((20, 4), dtype="float32").tolist()
def benchmark_points(canvas, n_objects, n_verts, *, clipping_planes=None):
renderer = gfx.WgpuRenderer(canvas, blend_mode="ordered2")
renderer.measure_gpu_times = True
scene = gfx.Scene()
x = np.linspace(-480, 480, n_verts, dtype=np.float32)
y = np.sin(x / 30) * 240
positions = np.column_stack([x, y, np.zeros_like(x)])
for i in range(n_objects):
points = gfx.Points(
gfx.Geometry(positions=positions),
gfx.PointsMaterial(
size=20,
clipping_planes=clipping_planes,
),
)
points.local.y = 500 * (i - 0.5 * n_objects) / n_objects
scene.add(points)
scene.add(gfx.Background.from_color("#000"))
camera = gfx.OrthographicCamera(1000, 1000)
canvas.request_draw(lambda: renderer.render(scene, camera))
# First draw to load stuff in memory
canvas._draw_frame_and_present()
yield None
while True:
canvas._draw_frame_and_present() # includes time to take screenshot
yield # renderer.stats["gpu_times"]
# A couple of measurements of 100k points, divided over multiple objects
@benchmark
def benchmark_points_1_100k(canvas):
# 1 points object with 100000 points
yield from benchmark_points(canvas, 1, 100_000)
@benchmark
def benchmark_points_1_100k_five_clipping_planes(canvas):
# 1 points object with 100000 points
yield from benchmark_points(
canvas, 1, 100_000, clipping_planes=five_clipping_planes
)
@benchmark
def benchmark_points_1_100k_twenty_clipping_planes(canvas):
# 1 points object with 100000 points
yield from benchmark_points(
canvas, 1, 100_000, clipping_planes=twenty_clipping_planes
)
@benchmark
def benchmark_points_100_1000(canvas):
# 100 points objects with 1000 points each
yield from benchmark_points(canvas, 100, 1000)
@benchmark
def benchmark_points_100_1000_five_clipping_planes(canvas):
# 100 points objects with 1000 points each
yield from benchmark_points(canvas, 100, 1000, clipping_planes=five_clipping_planes)
@benchmark
def benchmark_points_100_1000_twenty_clipping_planes(canvas):
# 100 points objects with 1000 points each
yield from benchmark_points(
canvas, 100, 1000, clipping_planes=twenty_clipping_planes
)
@benchmark
def benchmark_points_1000_100(canvas):
# 1000 points objects with 100 points each
yield from benchmark_points(canvas, 1000, 100)
@benchmark
def benchmark_points_1000_100_five_clipping_planes(canvas):
# 1000 points objects with 100 points each
yield from benchmark_points(canvas, 1000, 100, clipping_planes=five_clipping_planes)
@benchmark
def benchmark_points_1000_100_twenty_clipping_planes(canvas):
# 1000 points objects with 100 points each
yield from benchmark_points(
canvas, 1000, 100, clipping_planes=twenty_clipping_planes
)
# A simple case, and a case of drawing 1M
@benchmark
def benchmark_points_10_10(canvas):
# 10 points objects with 10 points each
yield from benchmark_points(canvas, 10, 10)
@benchmark
def benchmark_points_10_10_five_clipping_planes(canvas):
# 10 points objects with 10 points each
yield from benchmark_points(canvas, 10, 10, clipping_planes=five_clipping_planes)
@benchmark
def benchmark_points_10_10_twenty_clipping_planes(canvas):
# 10 points objects with 10 points each
yield from benchmark_points(canvas, 10, 10, clipping_planes=twenty_clipping_planes)
@benchmark
def benchmark_points_1_1m(canvas):
# 1 points object with 1mpoints
yield from benchmark_points(canvas, 1, 1_000_000)
@benchmark
def benchmark_points_1_1m_five_clipping_planes(canvas):
# 1 points object with 1mpoints
yield from benchmark_points(
canvas, 1, 1_000_000, clipping_planes=five_clipping_planes
)
@benchmark
def benchmark_points_1_1m_twenty_clipping_planes(canvas):
# 1 points object with 1mpoints
yield from benchmark_points(
canvas, 1, 1_000_000, clipping_planes=twenty_clipping_planes
)
if __name__ == "__main__":
from wgpu.gui.auto import WgpuCanvas
c = None # WgpuCanvas()
run_all(globals(), c)