// Get the appropriate flag to use for creating files // We use fmap on Windows platforms for files less than // 512kb. This is a fairly low limit, but avoids making // things slower in some cases. Since most of what this // library is used for is extracting tarballs of many // relatively small files in npm packages and the like, // it can be a big boost on Windows platforms. import fs from 'fs'; const platform = process.env.__FAKE_PLATFORM__ || process.platform; const isWindows = platform === 'win32'; /* c8 ignore start */ const { O_CREAT, O_TRUNC, O_WRONLY } = fs.constants; const UV_FS_O_FILEMAP = Number(process.env.__FAKE_FS_O_FILENAME__) || fs.constants.UV_FS_O_FILEMAP || 0; /* c8 ignore stop */ const fMapEnabled = isWindows && !!UV_FS_O_FILEMAP; const fMapLimit = 512 * 1024; const fMapFlag = UV_FS_O_FILEMAP | O_TRUNC | O_CREAT | O_WRONLY; export const getWriteFlag = !fMapEnabled ? () => 'w' : (size) => (size < fMapLimit ? fMapFlag : 'w'); //# sourceMappingURL=get-write-flag.js.map