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Benchmarks

This page is dedicated to simple benchmarking of various tesseract version and options. As input image for testing is used image from issue 236.

Results

Build tessdata_best tessdata_fast tessdata
305 - - 2.4713
413noavx 37.6052 5.1589 10.1519
413avx 12.7300 2.9538 4.0860
501 6.1981 2.1241 2.9107
501ap 6.1369 2.1254 2.9221
501openmp 3.4590 1.9612 2.3554

Information about testing environment

  • Windows 10 64bit
  • compiler: VS 2019
  • CPU: Intel(R) Core(TM) i7-10750H CPU @ 2.60GHz 6 cores
  • memory: 16GB RAM

Tested with python code

import timeit
import time
import os
import pytesseract

start_time = time.time()
tess_exe = r"msvc.v5.openmp\tesseract.exe"
test_image = r"i263_speed.jpg"
os.environ['TESSDATA_PREFIX'] = r"tessdata_best\tessdata"

code_to_test = """
import pytesseract
pytesseract.pytesseract.tesseract_cmd = r"{}"
pytesseract.pytesseract.image_to_string(r"{}", lang = 'eng')
"""

runs = 15
elapsed_time = timeit.timeit(code_to_test.format((tess_exe, test_image), number=runs)/runs
print("\nDuration:", elapsed_time)

Tesseract build info

information provided by tesseract -v

3.05

305

It uses the legacy engine.

tesseract 3.05.02
 leptonica-1.83.0 (Dec 17 2021, 17:33:37) [MSC v.1929 LIB Release x64]
  libgif 5.2.1 : libjpeg 6b (libjpeg-turbo 2.0.91) : libpng 1.6.37 : libtiff 4.3.0 : zlib 1.2.11 : libwebp 1.2.0 : libopenjp2 2.4.0

4.1

413noavx

Build without AVX2/AVX/SSE4 support

tesseract 4.1.3
 leptonica-1.83.0 (Dec 17 2021, 17:33:37) [MSC v.1929 LIB Release x64]
  libgif 5.2.1 : libjpeg 6b (libjpeg-turbo 2.0.91) : libpng 1.6.37 : libtiff 4.3.0 : zlib 1.2.11 : libwebp 1.2.0 : libopenjp2 2.4.0
 Found libarchive 3.5.1 zlib/1.2.11 liblzma/5.2.4 bz2lib/1.0.6 libzstd/1.4.9

413avx

Build with AVX2/AVX/SSE4 support

tesseract 4.1.3-1-ge9986
 leptonica-1.83.0 (Jan 26 2022, 19:15:03) [MSC v.1929 LIB Release x64]
  libgif 5.2.1 : libjpeg 6b (libjpeg-turbo 2.0.91) : libpng 1.6.37 : libtiff 4.3.0 : zlib 1.2.11
 Found AVX2
 Found AVX
 Found FMA
 Found SSE
 Found libarchive 3.5.1 zlib/1.2.11 liblzma/5.2.4 bz2lib/1.0.6 libzstd/1.4.9

5.0

501

AVX2 supported

tesseract 5.0.1
 leptonica-1.83.0 (Dec 17 2021, 17:33:37) [MSC v.1929 LIB Release x64]
  libgif 5.2.1 : libjpeg 6b (libjpeg-turbo 2.0.91) : libpng 1.6.37 : libtiff 4.3.0 : zlib 1.2.11 : libwebp 1.2.0 : libopenjp2 2.4.0
 Found AVX2
 Found AVX
 Found FMA
 Found SSE4.1
 Found libarchive 3.5.1 zlib/1.2.11 liblzma/5.2.4 bz2lib/1.0.6 libzstd/1.4.9
 Found libcurl/7.75.0 zlib/1.2.11 libssh2/1.10.1_DEV

501ap

build with: cmake -E env CXXFLAGS="/Qpar /fp:fast" cmake ..

tesseract 5.0.1
 leptonica-1.83.0 (Dec 17 2021, 17:33:37) [MSC v.1929 LIB Release x64]
  libgif 5.2.1 : libjpeg 6b (libjpeg-turbo 2.0.91) : libpng 1.6.37 : libtiff 4.3.0 : zlib 1.2.11 : libwebp 1.2.0 : libopenjp2 2.4.0
 Found AVX2
 Found AVX
 Found FMA
 Found SSE4.1
 Found libarchive 3.5.1 zlib/1.2.11 liblzma/5.2.4 bz2lib/1.0.6 libzstd/1.4.9
 Found libcurl/7.75.0 zlib/1.2.11 libssh2/1.10.1_DEV

501openmp

The OpenMP build is known to waste a lot of CPU time. As several users report problems, it is disabled by default in version 5.0.1 and later releases. For other versions (>= 4.x) it is suggested to use the environment variable OMP_THREAD_LIMIT=1. Input from OpenMP experts would be appreciated.

tesseract 5.0.1
 leptonica-1.83.0 (Dec 17 2021, 17:33:37) [MSC v.1929 LIB Release x64]
  libgif 5.2.1 : libjpeg 6b (libjpeg-turbo 2.0.91) : libpng 1.6.37 : libtiff 4.3.0 : zlib 1.2.11 : libwebp 1.2.0 : libopenjp2 2.4.0
 Found AVX2
 Found AVX
 Found FMA
 Found SSE4.1
 Found OpenMP 2019
 Found libarchive 3.5.1 zlib/1.2.11 liblzma/5.2.4 bz2lib/1.0.6 libzstd/1.4.9
 Found libcurl/7.75.0 zlib/1.2.11 libssh2/1.10.1_DEV