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130 changes: 128 additions & 2 deletions Cargo.lock

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3 changes: 2 additions & 1 deletion Cargo.toml
Original file line number Diff line number Diff line change
Expand Up @@ -10,4 +10,5 @@ crate-type = ["cdylib"]

[dependencies]
pyo3 = { version = "0.25.0", features = ["extension-module", "anyhow", "auto-initialize"] }
numpy = "0.25"
numpy = "0.25"
sprs = "0.11"
66 changes: 40 additions & 26 deletions python/fastlaps.py
Original file line number Diff line number Diff line change
Expand Up @@ -7,33 +7,46 @@

if __name__ == "__main__":
# Quick example for a 3x3 matrix
matrix = np.random.rand(4, 5)
for algo in ["lapjv", "hungarian"]:
print(f"\nAlgorithm: {algo}")
start = time.time()
fastlap_cost, fastlap_rows, fastlap_cols = fastlap.solve_lap(matrix, algo)
fastlap_end = time.time()
print(f"fastlap.{algo}: Time={fastlap_end - start:.8f}s")
print(
f"fastlap.{algo}: Cost={fastlap_cost}, Rows={fastlap_rows}, Cols={fastlap_cols}"
)
if algo == "hungarian":
cols = 5
rows = 5
algos = ["lapjv", "hungarian", "lapmod"]
matrix = np.random.rand(rows, cols)
for i in range(10):

for algo in algos:
if algo != "lapjv":
continue
print(f"\nAlgorithm: {algo}")
start = time.time()
scipy_rows, scipy_cols = linear_sum_assignment(matrix)
scipy_cost = matrix[scipy_rows, scipy_cols].sum()
scipy_end = time.time()
print(
f"scipy.optimize.linear_sum_assignment: Time={scipy_end - start:.8f}s"
)
print(
f"scipy.optimize.linear_sum_assignment: Cost={scipy_cost}, Rows={list(scipy_rows)}, Cols={list(scipy_cols)}"
)
if algo == "lapjv":
start = time.time()
lap_cost, lap_rows, lap_cols = lap.lapjv(matrix, extend_cost=True)
lap_end = time.time()
print(f"lap.lapjv: Time={lap_end - start:.8f}s")
print(f"lap.lapjv: Cost={lap_cost}, Rows={lap_rows}, Cols={lap_cols}")
fastlap_cost, fastlap_rows, fastlap_cols = fastlap.solve_lap(matrix, algo)
fastlap_end = time.time()
print(f"fastlap.{algo}: Time={fastlap_end - start:.8f}s")
# print(
# f"fastlap.{algo}: Cost={fastlap_cost}, Rows={list(fastlap_rows)}, Cols={list(fastlap_cols)}"
# )
if algo == "hungarian":
start = time.time()
scipy_rows, scipy_cols = linear_sum_assignment(matrix)
scipy_cost = matrix[scipy_rows, scipy_cols].sum()
scipy_end = time.time()
print(
f"scipy.optimize.linear_sum_assignment: Time={scipy_end - start:.8f}s"
)
print(
f"scipy.optimize.linear_sum_assignment: Cost={scipy_cost}, Rows={list(scipy_rows)}, Cols={list(scipy_cols)}"
)
if algo == "lapjv":
start = time.time()
lap_cost, lap_rows, lap_cols = lap.lapjv(matrix, extend_cost=True)
lap_end = time.time()
print(f"lap.lapjv: Time={lap_end - start:.8f}s")
# print(f"lap.lapjv: Cost={lap_cost}, Rows={lap_rows}, Cols={lap_cols}")
if algo == "lapmod":
start = time.time()
lapmod_cost, lapmod_rows, lapmod_cols = lap.lapmod(matrix)
lapmod_end = time.time()
print(f"lap.lapmod: Time={lapmod_end - start:.8f}s")
# print(f"lap.lapmod: Cost={lapmod_cost}, Rows={lapmod_rows}, Cols={lapmod_cols}")

"""
First release:
Expand All @@ -49,4 +62,5 @@
fastlap.hungarian: Cost=0.7465856501551806, Rows=[2, 0, 1, 3], Cols=[1, 2, 0, 3, 18446744073709551615]
scipy.optimize.linear_sum_assignment: Time=0.00001287s
scipy.optimize.linear_sum_assignment: Cost=0.6229432588732741, Rows=[0, 1, 2, 3], Cols=[2, 0, 1, 4]

"""
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