lib/std/Io.zig             |  36 +++++-
 lib/std/Io/File.zig        |  21 +++-
 lib/std/Io/File/Writer.zig |  27 +----
 lib/std/Io/Threaded.zig    | 200 ++++++++++++++++++++++++++------
 lib/std/Progress.zig       |   4 +-
 5 files changed, 217 insertions(+), 71 deletions(-)