base 环境
```
(base) git@Data_share:/mnt/e/viz-server/viz$ time python bench.py
<class 'numpy.ndarray'>

real 0m0.771s
user 0m1.063s
sys 0m1.781s

(base) git@Data_share:/mnt/e/viz-server/viz$ python
Python 3.8.5 (default, Sep 4 2020, 07:30:14)
[GCC 7.3.0] :: Anaconda, Inc. on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> exit()

(base) git@Data_share:/mnt/e/viz-server/viz$ pip list
Package Version
---------------------- -------------------
affine 2.3.0
aiohttp 3.7.3
aiohttp-cors 0.7.0
async-timeout 3.0.1
attrs 20.3.0
boto3 1.16.35
botocore 1.19.35
brotlipy 0.7.0
certifi 2020.6.20
cffi 1.14.3
chardet 3.0.4
click 7.1.2
click-plugins 1.1.1
cligj 0.7.1
conda 4.9.2
conda-package-handling 1.7.2
cryptography 3.2.1
idna 2.10
jmespath 0.10.0
mercantile 1.1.6
morecantile 2.0.1
multidict 5.1.0
numexpr 2.7.1
numpy 1.19.4
pip 20.2.4
pycosat 0.6.3
pycparser 2.20
pydantic 1.7.3
pyOpenSSL 19.1.0
pyparsing 2.4.7
PySocks 1.7.1
python-dateutil 2.8.1
python-dotenv 0.15.0
rasterio 1.2a1
redis 3.5.3
requests 2.24.0
rio-color 1.0.0
rio-mucho 1.0.0
rio-tiler 2.0.0rc3
ruamel-yaml 0.15.87
s3transfer 0.3.3
setuptools 50.3.1.post20201107
six 1.15.0
snuggs 1.4.7
tqdm 4.51.0
typing-extensions 3.7.4.3
urllib3 1.25.11
wheel 0.35.1
yarl 1.6.3
```