> But what config are you using? Are you using HLSL at all? And if so, what GPU do you > have? If I turn HLSL off it runs fine.
I discounted HLSL because you said this....
"If I switch disable HLSL the problem a SLIGHTLY improved, but it's still not great. "
Just enabling hlsl with default settings makes no visible difference to how fast it runs (holding insert allows me to get 200%+) whether I use my NVIDIA GeForce GTX 960M or Intel(R) HD Graphics 530, what card and settings are you using?
hlslpath hlsl hlsl_enable 1 hlsl_oversampling 0 hlsl_write hlsl_snap_width 2048 hlsl_snap_height 1536 shadow_mask_tile_mode 0 shadow_mask_alpha 0.0 shadow_mask_texture shadow-mask.png shadow_mask_x_count 6 shadow_mask_y_count 4 shadow_mask_usize 0.1875 shadow_mask_vsize 0.25 shadow_mask_uoffset 0.0 shadow_mask_voffset 0.0 distortion 0.0 cubic_distortion 0.0 distort_corner 0.0 round_corner 0.0 smooth_border 0.0 reflection 0.0 vignetting 0.0 scanline_alpha 0.0 scanline_size 1.0 scanline_height 1.0 scanline_variation 1.0 scanline_bright_scale 1.0 scanline_bright_offset 0.0 scanline_jitter 0.0 hum_bar_alpha 0.0 defocus 0.0,0.0 converge_x 0.0,0.0,0.0 converge_y 0.0,0.0,0.0 radial_converge_x 0.0,0.0,0.0 radial_converge_y 0.0,0.0,0.0 red_ratio 1.0,0.0,0.0 grn_ratio 0.0,1.0,0.0 blu_ratio 0.0,0.0,1.0 saturation 1.0 offset 0.0,0.0,0.0 scale 1.0,1.0,1.0 power 1.0,1.0,1.0 floor 0.0,0.0,0.0 phosphor_life 0.0,0.0,0.0
It could be a frame rate issue, I don't use any sync/triple buffering. You might want to start from scratch with a default mame.ini
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