When I try to run alacritty, the window shows up with a white screen. After a few minutes it may render the terminal but the response is very slow. The interesting thing about this is that the app will work and be very responsive with the double or triple verbose flag.

alacritty -v - Same result, white screen initially. Slow response and performance if the terminal renders.

alacritty -vv - Fast response and terminal renders.

alacritty -vvv - Same result as alacritty -vv.

Alacritty version: 0.15.1 (I tried some earlier versions too with the same results)

Windows Version: Windows 10 Pro 10.0.19045

I've tried setting the terminal.shell to cmd, powershell, and pwsh and it behaves the same with all 3 types.

alacritty -v output

[0.000035200s] [INFO ] [alacritty] Welcome to Alacritty
[0.001329600s] [INFO ] [alacritty] Version 0.15.1 (0c405d5)
[0.006220500s] [INFO ] [alacritty] Configuration files loaded from:
"C:\Users\belle\AppData\Roaming\alacritty\alacritty.toml"
[0.039065400s] [INFO ] [alacritty] Window scale factor: 2
[0.109030400s] [INFO ] [alacritty] Using WGL
[0.142818600s] [INFO ] [alacritty] Running on Intel(R) HD Graphics 520
[0.143253300s] [INFO ] [alacritty] OpenGL version 3.3.0 - Build 24.20.100.6299, shader_version 3.30 - Build 24.20.100.6299
[0.143925600s] [INFO ] [alacritty] Using OpenGL 3.3 renderer
[0.266609900s] [INFO ] [alacritty] Cell size: 16 x 35
[0.266989800s] [INFO ] [alacritty] Padding: 0 x 0
[0.267680800s] [INFO ] [alacritty] Width: 800, Height: 600
[0.324663200s] [INFO ] [alacritty] PTY dimensions: 17 x 50
[0.325830000s] [INFO ] [alacritty_terminal] Using Windows API for pseudoconsole
[0.577729000s] [INFO ] [alacritty] Initialisation complete

alacritty -vv output

[0.000027400s] [INFO ] [alacritty] Welcome to Alacritty
[0.004205400s] [INFO ] [alacritty] Version 0.15.1 (0c405d5)
[0.011150900s] [INFO ] [alacritty] Configuration files loaded from:
"C:\Users\belle\AppData\Roaming\alacritty\alacritty.toml"
[0.044108400s] [INFO ] [alacritty] Window scale factor: 2
[0.105342400s] [INFO ] [alacritty] Using WGL
[0.106930100s] [DEBUG] [alacritty] Picked GL Config:
buffer_type: Some(Rgb { r_size: 8, g_size: 8, b_size: 8 })
alpha_size: 8
num_samples: 0
hardware_accelerated: true
supports_transparency: Some(false)
config_api: Api(OPENGL | GLES1 | GLES2)
srgb_capable: true
[0.126129400s] [DEBUG] [alacritty] Loading "Consolas" font
[0.137795400s] [INFO ] [alacritty] Running on Intel(R) HD Graphics 520
[0.138217700s] [INFO ] [alacritty] OpenGL version 3.3.0 - Build 24.20.100.6299, shader_version 3.30 - Build 24.20.100.6299
[0.138543100s] [INFO ] [alacritty] Using OpenGL 3.3 renderer
[0.223096000s] [DEBUG] [alacritty] Enabled debug logging for OpenGL
[0.223594600s] [DEBUG] [alacritty] Filling glyph cache with common glyphs
[0.274252900s] [INFO ] [alacritty] Cell size: 16 x 35
[0.274630300s] [INFO ] [alacritty] Padding: 0 x 0
[0.275196000s] [INFO ] [alacritty] Width: 800, Height: 600
[0.331205900s] [INFO ] [alacritty] PTY dimensions: 17 x 50
[0.333330100s] [INFO ] [alacritty_terminal] Using Windows API for pseudoconsole
[0.601634500s] [INFO ] [alacritty] Initialisation complete
[3.384629600s] [DEBUG] [alacritty] [gl_render] API_ID_RECOMPILE_FRAGMENT_SHADER performance warning has been generated. Fragment shader recompiled due to state change.