Use std::unique_ptr rather than raw pointer #1718

Job	Run time
Linux-GCC9-deps=forcefallback	8m 20s
Linux-GCC9-deps=default	1m 27s
Emscripten	2m 49s
FreeBSD	4m 29s
Linux-GCC13-deps=forcefallback	12m 37s
macOS-deps=enabled	1m 57s
Linux-GCC13-deps=default	6m 4s
MSYS	2m 43s
macOS-deps=disabled	1m 2s
MSYS2-UCRT64-deps=enabled	5m 47s
Linux-Clang11-deps=forcefallback	8m 41s
MSYS2-CLANG64-deps=enabled	3m 36s
MSVC-forcefallback-x64	4m 51s
Linux-Clang11-deps=default	1m 45s
MSYS2-UCRT64-deps=disabled	3m 53s
clang-cl-forcefallback	4m 59s
MSVC-forcefallback-x86	5m 13s
Linux-Clang19-deps=forcefallback	9m 44s
MSYS2-CLANG64-deps=disabled	2m 40s
clang-cl-default	3m 14s
MSVC-default-x64	2m 22s
Linux-Clang19-deps=default	2m 29s
MSVC-default-x86	4m 4s
	1h 44m 46s

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