Combine f.write(pack( "<d"etc., )) calls #99

Job	Run time
pylint	16s
test_on_EOL_Pythons (2.7)	46s
test_on_EOL_Pythons (3.7)	43s
test_on_EOL_Pythons (3.8)	45s
pre-commit	10s
test_on_supported_Pythons (3.10, ubuntu-24.04)	40s
test_on_EOL_Pythons (3.5)	42s
test_on_supported_Pythons (3.9, ubuntu-24.04)	30s
test_on_supported_Pythons (3.9, macos-latest)	51s
test_on_supported_Pythons (3.10, macos-latest)	47s
test_on_supported_Pythons (3.11, macos-latest)	32s
test_on_supported_Pythons (3.9, windows-latest)	45s
test_on_EOL_Pythons (3.6)	44s
test_on_supported_Pythons (3.11, ubuntu-24.04)	28s
test_on_supported_Pythons (3.10, windows-latest)	53s
test_on_supported_Pythons (3.14.0-beta.4, ubuntu-24.04)	38s
test_on_supported_Pythons (3.11, windows-latest)	49s
test_on_supported_Pythons (3.12, macos-latest)	39s
test_on_supported_Pythons (3.12, ubuntu-24.04)	35s
test_on_supported_Pythons (3.13, ubuntu-24.04)	28s
test_on_supported_Pythons (3.14.0-beta.4, windows-latest)	1m 37s
test_on_supported_Pythons (3.14.0-beta.4, macos-latest)	53s
test_on_supported_Pythons (3.13, windows-latest)	1m 1s
test_on_supported_Pythons (3.13, macos-latest)	35s
test_on_supported_Pythons (3.12, windows-latest)	49s
	17m 36s

Provide feedback