#!/usr/bin/env python3

"""

Benchmark: JSON caching performance in data_loader.py

Compares repeated calls to load_all_projects() before and after caching.

The cache eliminates disk I/O after the first read.

"""

import time

import sys

import os

sys.path.insert(0, os.path.join(os.path.dirname(__file__), ".."))

from utils.data_loader import load_all_projects, clear_cache

def benchmark_cached_access(iterations=1000):

"""Benchmark repeated access with caching enabled."""

# Warmup - first call populates cache

clear_cache()

load_all_projects()

start = time.perf_counter()

for _ in range(iterations):

load_all_projects()

elapsed = time.perf_counter() - start

return elapsed

def benchmark_uncached_access(iterations=100):

"""

Simulate uncached access by clearing cache before each read.

Note: Using fewer iterations since this is much slower.

"""

start = time.perf_counter()

for _ in range(iterations):

clear_cache()

load_all_projects()

elapsed = time.perf_counter() - start

return elapsed

def main():

print("=" * 60)

print("Benchmark: data_loader.py JSON caching performance")

print("=" * 60)

# Benchmark cached access

cached_iters = 10000

cached_time = benchmark_cached_access(cached_iters)

cached_avg = (cached_time / cached_iters) * 1e6 # microseconds

print(f"\nCached access ({cached_iters:,} iterations):")

print(f" Total time: {cached_time:.4f}s")

print(f" Avg per call: {cached_avg:.2f} µs")

# Benchmark uncached access

uncached_iters = 100

uncached_time = benchmark_uncached_access(uncached_iters)

uncached_avg = (uncached_time / uncached_iters) * 1e6 # microseconds

print(f"\nUncached access ({uncached_iters:,} iterations):")

print(f" Total time: {uncached_time:.4f}s")

print(f" Avg per call: {uncached_avg:.2f} µs")

# Calculate speedup

speedup = uncached_avg / cached_avg

print(f"\n{'=' * 60}")

print(f"Speedup: {speedup:.1f}x faster with caching")

print(f"Time saved per call: {uncached_avg - cached_avg:.0f} µs")

print("=" * 60)

return 0

if __name__ == "__main__":

sys.exit(main())