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Update benchmark tables with 512px and 1024px comparison

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@@ -63,25 +63,44 @@ python -m mlx_vlm.generate \
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  ## Benchmark
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- Benchmark condition:
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- - Images: three 512px pedestrian wayfinding test images
 
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  - Prompt: `Describe what is visible for pedestrian wayfinding in one short sentence. Do not list categories. Do not mention anything you cannot see. Keep under 30 words.`
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  - Max tokens: `64`
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  - Temperature: `0.0`
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- - Model loaded once, then images processed sequentially
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-
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- | Model | Size | Load | Img1 | Img2 | Img3 | Avg |
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- |---|---:|---:|---:|---:|---:|---:|
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- | fastvlm-0.5b-mlx-q4 | 819M | 2.85s | 0.299s | 0.351s | 0.338s | 0.330s |
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- | fastvlm-0.5b-mlx-q8 | 1.1G | 2.78s | 0.382s | 0.459s | 0.396s | 0.412s |
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- | fastvlm-0.5b-mlx-fp16 | 1.6G | 2.93s | 0.529s | 0.478s | 0.407s | 0.471s |
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- | fastvlm-1.5b-mlx-q4 | 1.4G | 2.46s | 0.454s | 0.462s | 0.443s | 0.453s |
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- | fastvlm-1.5b-mlx-q8 | 2.2G | 2.49s | 0.607s | 0.592s | 0.477s | 0.559s |
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- | fastvlm-1.5b-mlx-fp16 | 3.8G | 2.83s | 0.702s | 0.706s | 0.567s | 0.658s |
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- | **fastvlm-7b-mlx-q4** | **4.9G** | **3.00s** | **1.139s** | **1.303s** | **1.277s** | **1.239s** |
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- | fastvlm-7b-mlx-q8 | 8.0G | 3.67s | 1.324s | 1.583s | 1.438s | 1.448s |
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- | fastvlm-7b-mlx-fp16 | 15G | 46.07s | 1.536s | 2.004s | 1.885s | 1.808s |
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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  ## Compatibility
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  ## Benchmark
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+ Benchmarked on an Apple Silicon Mac with the patched FastVLM `mlx-vlm` workflow.
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+ - Task: pedestrian wayfinding captioning
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+ - Images: three local test images resized to 512px and 1024px long edge
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  - Prompt: `Describe what is visible for pedestrian wayfinding in one short sentence. Do not list categories. Do not mention anything you cannot see. Keep under 30 words.`
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  - Max tokens: `64`
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  - Temperature: `0.0`
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+ - Timing: model loaded once per image set, then three images processed sequentially
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+
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+ ### Model Selection
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+
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+ | Model | Size | Precision | Avg 512px | Avg 1024px | Load | Recommended use |
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+ |---|---:|---|---:|---:|---:|---|
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+ | fastvlm-0.5b-mlx-q4 | 819M | q4 | 0.338s | 0.370s | 2.82s | Smallest and fastest; rough real-time captions |
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+ | fastvlm-0.5b-mlx-q8 | 1.1G | q8 | 0.419s | 0.414s | 2.57s | Fast, with richer captions than 0.5B q4 |
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+ | fastvlm-0.5b-mlx-fp16 | 1.6G | fp16 | 0.435s | 0.421s | 2.79s | Small FP16 baseline |
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+ | fastvlm-1.5b-mlx-q4 | 1.4G | q4 | 0.447s | 0.464s | 2.65s | Best real-time balance for pedestrian wayfinding |
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+ | fastvlm-1.5b-mlx-q8 | 2.2G | q8 | 0.552s | 0.541s | 2.68s | More detail while staying sub-second |
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+ | fastvlm-1.5b-mlx-fp16 | 3.8G | fp16 | 0.636s | 0.557s | 3.08s | 1.5B FP16 reference variant |
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+ | **fastvlm-7b-mlx-q4** | **4.9G** | **q4** | **1.263s** | **1.241s** | **3.04s** | **Best quality/latency tradeoff among 7B variants** |
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+ | fastvlm-7b-mlx-q8 | 8.0G | q8 | 1.497s | 1.495s | 3.85s | Higher precision 7B, slower than q4 |
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+ | fastvlm-7b-mlx-fp16 | 15G | fp16 | 1.834s | 1.874s | 45.48s | Full precision reference; expensive to load |
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+
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+ ### Per-Image Timing
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+ Each cell is `img1 / img2 / img3` inference time in seconds.
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+
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+ | Model | 512px images | 1024px images |
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+ |---|---:|---:|
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+ | fastvlm-0.5b-mlx-q4 | 0.318 / 0.353 / 0.343 | 0.374 / 0.370 / 0.366 |
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+ | fastvlm-0.5b-mlx-q8 | 0.393 / 0.465 / 0.400 | 0.424 / 0.387 / 0.431 |
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+ | fastvlm-0.5b-mlx-fp16 | 0.394 / 0.490 / 0.421 | 0.430 / 0.395 / 0.437 |
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+ | fastvlm-1.5b-mlx-q4 | 0.454 / 0.458 / 0.430 | 0.465 / 0.472 / 0.456 |
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+ | fastvlm-1.5b-mlx-q8 | 0.591 / 0.611 / 0.453 | 0.594 / 0.552 / 0.477 |
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+ | fastvlm-1.5b-mlx-fp16 | 0.701 / 0.709 / 0.496 | 0.520 / 0.635 / 0.516 |
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+ | **fastvlm-7b-mlx-q4** | **1.161 / 1.330 / 1.297** | **1.081 / 1.343 / 1.298** |
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+ | fastvlm-7b-mlx-q8 | 1.364 / 1.639 / 1.487 | 1.341 / 1.712 / 1.432 |
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+ | fastvlm-7b-mlx-fp16 | 1.561 / 2.041 / 1.902 | 1.595 / 2.277 / 1.749 |
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  ## Compatibility
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