Cloud Vision API looks slower only for first time
Yusuke Yonenaga
Does someone know why?
1st: 2.673ms
2nd: 0.126ms
3rd: 0.111ms
4th: 0.117ms
5th: 0.183ms
6ht: 0.218ms
7th: 0.192ms
Each time, different (but almost same size) picture was used.
It's done by script in succession.
Carlos Clement Bellido
Hi! Possibly you’re facing some warmup or caching that boosts performance of subsequent calls, can you give more details about this behavior?
When is a call a "first call”, when the program first runs?
When you ran the script, in each run was the same picture used or you changed the picture in each petition? In other words:
1st: 2.673ms – This image is the same in the next tests (2nd, 3rd, 4th…) or do you change the picture only when the script starts?
2nd: 0.126ms
3rd: 0.111ms
4th: 0.117ms
5th: 0.183ms
6ht: 0.218ms
7th: 0.192ms
Yusuke Yonenaga
>Possibly you’re facing some warmup or caching that boosts performance of subsequent calls, >can you give more details about this behavior? --> If that's the case, if our system use Vision API as background, it always takes more than 2 second?
< Use Case >
1 system user calls Vision API (for license card text detection) only once in their registaration process.
When you ran the script, in each run was the same picture used or you changed the picture in each petition? --> I changed picture for each time (means, defferent picture was used for 1st/2nd/3rd... but each file size is almost same.)
1st: 2.673ms – This image is the same in the next tests (2nd, 3rd, 4th…) or do you change the picture only when the script starts? --> No, image used for 1st and one for 2nd are different.
2nd: 0.126ms
3rd: 0.111ms
4th: 0.117ms
5th: 0.183ms
6ht: 0.218ms
7th: 0.192ms
The below is script used for trial, just FYI.
Script perform Vision API subsequently based on files in the directory.
And time count starts just before using API.
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var fs = require('fs'); var path = require('path'); Folder="./images/mitree/" output="./results/mitree/" const vision = require("@google-cloud/vision"); const client = new vision.ImageAnnotatorClient({ keyFilename : "./cloudvision-333803-XXXXXX.json" }) fs.readdirSync(Folder).forEach((file) => { var filename = file.split(".")[0]; filename=filename var txtfilename=output+filename+".txt" console.time(); client .textDetection(Folder+filename+".jpg") .then(results => { const detections = results[0].textAnnotations; fs.writeFile(txtfilename, detections[0].description, function (err) { if (err) return console.log(err); }); }) .catch(err => { console.error('ERROR:', err); }); console.timeEnd(); })
