5/1/2023 0 Comments Potplayer avisynth![]() Let's also suppose that we have a 圆4 equivalent porting which has been ported using the C++ code but the one who ported it didn't wrote brand new intrinsics for the 圆4 registers/assemblies, but compiled the ported C++ Code and targeted SSE4.2. Suppose we have our filter called "filter1.dll" which has been written in C++ with manually written intrinsics and makes use of SSE4.2 x86. "So I should definitely use Avisynth 圆4!"Īvisynth x86 has been the de facto standard for years and years and back in the days people have been writing C++ Code with manually written intrinsics, while for the 圆4 version, the porting is generally done on the "plain" C++ Code. "fair enough, then if I use Avisynth 圆4 and I use 圆4 plugins/filters they are gonna be faster if the creator wrote intrinsics?" On Avisynth the story is pretty different, 'cause Avisynth itself as frameserver doesn't do anything in terms of assembly optimizations as it lets filters/plugin writers optimize them (don't get me wrong, you can compile Avisynth core yourself and target SSE4.2 but anything over SSE2 it's probably gonna be irrelevant). If you take a look at x264, x265 as encoders, they make extensive use of registers and assembly optimizations with manually written intrinsics and if you compare the encode with the very same assembly optimization (let's say SSE4.2) with x86 and 圆4, the latter is gonna be faster. X64 has more registers, so whenever you compile a program and target certain assembly optimizations (SSE2, SSSE3, SSE4.1, SSE4.2, AVX, AVX2, AVX512) if the program is gonna make use of them, it's gonna be faster, however it might also not use them. If 64bit players and it's plugins like avisynth is faster-better, how much is it? Some 32-Bit versions of Windows have an "artificial" 4 GB limit, purely for license reasons, though! 32-Bit processes running on a 64-Bit system are still limited to at most 4 GB.īTW: The system, as a whole, can address more than 4 GB of physical memory, even in 32-Bit mode, thank to PAE () (Physical Address Extension). On 64-Bit systems, there is no practical limit on how much (virtual) memory a single 64-Bit process can address. This can be extended to 3 GB, by adding the "/3GB" boot parameter to Windows and compiling the individual EXE with the "/LARGEADDRESSAWARE" flag. ![]() But it's only 2 GB in practice (on Windows), because Windows reserves the upper "half" of the process' address space for internal purposes. ![]() On a 32-Bit operating system, the memory limit for a single process is 4 GB – in theory. Most important, a 64-Bit operating system allows addressing more (virtual) memory in a single process. ![]() AND your computer must have a lot of memory. To see a big performance advantage your software needs to make use of a lot of memory (like HD video rendering, high resolution image processing etc). In 64-bit the CPU and the software can address much more memory than in 32-bit. ![]()
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