Difference between .pb and .pbtxt in tensorflow?
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Understanding .pb
and .pbtxt
Files in TensorFlow
In TensorFlow, files with extensions .pb
and .pbtxt
are used to store models and computational graphs. While they serve similar purposes, these files have different characteristics and use-cases. This article delves into the differences between these file formats, the contexts in which they are used, and provides examples to solidify understanding.
Introduction to TensorFlow Model Files
TensorFlow uses protocol buffers (protobufs) as a language-neutral, platform-neutral way of serializing structured data. The .pb
and .pbtxt
file formats are both derived from protobufs and describe the computation graph of a model.
.pb: Binary format of protocol buffers..pbtxt: Text format (ASCII) of protocol buffers.
Differences Between .pb
and .pbtxt
| Aspect | .pb File | .pbtxt File |
| Format | Binary | ASCII (text) |
| Readability | Human unreadable (requires tools for decoding) | Human-readable (can be opened with a text editor) |
| File Size | Smaller due to binary compression | Larger due to text representation |
| Loading Speed | Generally faster to load | Slower due to parsing and conversion |
| Use Case | Ideal for production deployment due to compact size | Useful for debugging and understanding the graph structure |
| Conversion | Requires conversion via utility tools | Can be easily edited directly |
In-depth Look at Each File Type
.pb
File
The .pb
file format is the binary serialization of the TensorFlow model. It is the preferred choice for deploying models because:
- Efficiency: The binary nature ensures that the model file size is minimized, making it efficient for transmission and loading.
- Performance: Given its compact size, a
.pbfile typically loads faster than a.pbtxtfile, which allows for more efficient model inference in deployment scenarios.
Example Usage:
- Debugging: The human-readable text helps identify and fix issues in the model architecture.
- Visualization & Inspection: Developers gain insight into the structure and parameters of the model easily.
- Convert PB to PBTXT:
- Convert PBTXT to PB:
