NatLabRockies / EnergyPlusRegressionTool / 28476623914

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Pull #128

github

modernizes and speeds up the regression test runner

- The EnergyPlus execution wrapper now avoids process-wide `chdir` and global environment mutation, and instead runs each tool with an explicit working directory and environment. Subprocess calls are   centralized through a shared helper, avoid `shell=True`, support Python-script executables, and capture stdout/stderr consistently. Input files such as the IDD and weather file are hard-linked when possible,  falling back to copy.

- The suite runner now prepares runs for both builds up front and executes them through the same multiprocessing path, instead of running build A and build B sequentially. This should improve worker   utilization during full regression runs.

- The diffing path also adds fast exact-match checks for math, text, perf log, GLHE, and JSON comparisons,  plus caches the math threshold dictionary. This avoids unnecessary parsing and diff generation for files that are already byte-for-byte identical.

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