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| author | Joe Wilm <joe@jwilm.com> | 2017-07-01 09:58:37 -0700 |
|---|---|---|
| committer | Joe Wilm <jwilm@users.noreply.github.com> | 2017-07-01 10:24:50 -0700 |
| commit | 3cdba291242cc1c1684bff7f8242262b1cdeb582 (patch) | |
| tree | a3c99e43b698c9d0d360f1386b53e5e5777a8512 /Cargo.lock | |
| parent | 5a220b73db6385f107ff3e4fffad81e8831968be (diff) | |
| download | alacritty-3cdba291242cc1c1684bff7f8242262b1cdeb582.tar.gz alacritty-3cdba291242cc1c1684bff7f8242262b1cdeb582.zip | |
Reduce InstanceData footprint
The InstanceData type in the rendering subsystem was previously 16
floats which occupied a total of 64 bytes per instance. This meant that
for every character or background cell drawn, 64 bytes were sent to the
GPU. In the case of a 400x100 cell grid, a total of 2.5MB would be sent.
This patch reduces InstanceData's size to 26 bytes, a 60% improvement!
Using the above example for comparison, a worst case of 1MB would be
transferred.
The motivation for this patch comes from macOS. Once the terminal grid
would reach a certain size, performance experienced a sharp and dramatic
drop (render times would go from ~3ms to ~16ms). I don't want to
speculate too much on the underlying issue, but suffice it to say that
this patch alleviates the problem in my testing.
Diffstat (limited to 'Cargo.lock')
| -rw-r--r-- | Cargo.lock | 7 |
1 files changed, 7 insertions, 0 deletions
@@ -13,6 +13,7 @@ dependencies = [ "font 0.1.0", "gl_generator 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)", "glutin 0.6.1 (git+https://github.com/jwilm/glutin?rev=cc64178d39a1fa06b2c5403117e5e0ef24deeac4)", + "half 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)", "lazy_static 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)", "libc 0.2.23 (registry+https://github.com/rust-lang/crates.io-index)", "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)", @@ -449,6 +450,11 @@ dependencies = [ ] [[package]] +name = "half" +version = "1.0.0" +source = "registry+https://github.com/rust-lang/crates.io-index" + +[[package]] name = "heapsize" version = "0.3.9" source = "registry+https://github.com/rust-lang/crates.io-index" @@ -1291,6 +1297,7 @@ dependencies = [ "checksum gl_generator 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)" = "0940975a4ca12b088d32b5d5134826c47d2e73de4b0b459b05244c01503eccbb" "checksum gleam 0.2.32 (registry+https://github.com/rust-lang/crates.io-index)" = "9590e0e578d528a080c5abac678e7efbe349a73c7316faafd4073edf5f462d01" "checksum glutin 0.6.1 (git+https://github.com/jwilm/glutin?rev=cc64178d39a1fa06b2c5403117e5e0ef24deeac4)" = "<none>" +"checksum half 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "63d68db75012a85555434ee079e7e6337931f87a087ab2988becbadf64673a7f" "checksum heapsize 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)" = "556cd479866cf85c3f671209c85e8a6990211c916d1002c2fcb2e9b7cf60bc36" "checksum inotify 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "e8458c07bdbdaf309c80e2c3304d14c3db64e7465d4f07cf589ccb83fd0ff31a" "checksum itoa 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "eb2f404fbc66fd9aac13e998248505e7ecb2ad8e44ab6388684c5fb11c6c251c" |