Question

JS的新手，也是Node的新手。在Safari中运行Tesseract.js（文本识别软件：http://tesseract.projectnaptha.com）大约需要10秒，并立即开始输出进度。
节点（v6.9.1）（从终端或通过Electron运行）在开始输出到控制台之前将CPU运行100％，持续4分钟，持续4秒。然后它几乎在同一时间结束。

建议采取哪些问题排查步骤？这对于Node来说是常见的吗？我在日志中看到的唯一区别是Safari＆＃34;在缓存中找到了eng.traineddata＆＃34;清除和禁用缓存只会最小化时间。尝试了一些具有相同结果的.JPG和.PNG（300-600kb）文件 - 但是BMP（3.7MB）给出了快速的17秒响应 - 然后是错误并且没有完成。（这是一个＆＃39;下一个问题？）

var Tesseract = require('tesseract.js');  
var image = "./images/sample.jpg";

function tesseract(){
Tesseract.recognize(image)
.progress(function(message){console.log(message)})
.then(result => console.log(result.text))
} 
tesseract();

（编辑器强制将输出格式化为代码）
NODE console.Log

>Bash-3.2$ node JustTess.js  
   *Waits 4+ min and Then*   
{ status: 'loading tesseract core' }  
{ status: 'loaded tesseract core' }  
{ status: 'initializing tesseract', progress: 0 }  
pre-main prep time:108 ms  
{ status: 'initializing tesseract', progress: 1 }  
{ status: 'loading eng.traineddata', progress: 0 }  
{ status: 'loading eng.traineddata', progress: 1 }  
{ status: 'initializing api', progress: 0 }   
{ status: 'initializing api', progress: 0.3 }   
{ status: 'initializing api', progress: 0.6 }   
{ status: 'initializing api', progress: 1 }   
{ status: 'recognizing text', progress: 0 }   
{ status: 'recognizing text', progress: 0.014285714 }...

SAFARI console.log

>[Log]  – {status: "loading tesseract core"}  
[Log]  – {status: "loaded tesseract core"}   
[Log]  – {status: "initializing tesseract api"}  
[Log] pre-main prep time: 115 ms (index.js, line 10)  
[Log]  – {status: "initialized tesseract api"}   
[Log]  – {status: "found in cache eng.traineddata"}   
[Log]  – {status: "loaded eng.traineddata"}   
[Log]  – {status: "initialized with language"}   
[Log]  – {status: "recognizing text", progress: 0}   
[Log]  – {status: "recognizing text", progress: 0.0142}...

NODE with BMP

bash-3.2$ node JustTess.js
*After 17 sec*
    { status: 'initializing tesseract', progress: 0 }
pre-main prep time: 118 ms
{ status: 'initializing tesseract', progress: 1 }
{ status: 'loading eng.traineddata', progress: 0 }
{ status: 'loading eng.traineddata', progress: 1 }
{ status: 'initializing api', progress: 0 }
{ status: 'initializing api', progress: 0.3 }
{ status: 'initializing api', progress: 0.6 }
Error in pixRemoveColormap: pixs must be {1,2,4,8} bpp
Error in pixGetDepth: pix not defined
Error in pixGetWpl: pix not defined
Error in pixCreateHeader: depth must be {1, 2, 4, 8, 16, 24, 32}
Error in pixCreateNoInit: pixd not made
Error in pixCreateTemplateNoInit: pixd not made
Error in pixCreateTemplate: pixd not made
Error in pixCopy: pixd not made
{ status: 'initializing api', progress: 1 }
3
3

/Users/brent/Library/Mobile Documents/com~apple~CloudDocs/Programming/GitHub/ba/node_modules/tesser
act.js-core/index.js:4
function f(a){throw a;}var h=void 0,i=!0,j=null,k=!1;function aa(){return function(){}}function ba(
a){return function(){return a}}var n,Module;Module||(Module=eval("(function() { try { return Tesser
actCore || {} } catch(e) { return {} } })()"));var ca={},da;for(da in Module)Module.hasOwnProperty(
da)&&(ca[da]=Module[da]);var ea=i,fa=!ea&&i;
              ^
abort(3) at Error
    at Error (native)
    at Na (/Users/brent/Library/Mobile Documents/com~apple~CloudDocs/Programming/GitHub/ba/node_mod
ules/tesseract.js-core/index.js:32:26)
    at ka (/Users/brent/Library/Mobile Documents/com~apple~CloudDocs/Programming/GitHub/ba/node_mod
ules/tesseract.js-core/index.js:507:108)
    at Array.JHa (/Users/brent/Library/Mobile Documents/com~apple~CloudDocs/Programming/GitHub/ba/n
ode_modules/tesseract.js-core/index.js:402:25808)
    at xd (/Users/brent/Library/Mobile Documents/com~apple~CloudDocs/Programming/GitHub/ba/node_mod
ules/tesseract.js-core/index.js:382:924)
    at R.TesseractCore.V.Begin (/Users/brent/Library/Mobile Documents/com~apple~CloudDocs/Programmi
ng/GitHub/ba/node_modules/tesseract.js-core/index.js:511:288)
    at DumpLiterallyEverything (/Users/brent/Library/Mobile Documents/com~apple~CloudDocs/Programmi
ng/GitHub/ba/node_modules/tesseract.js/src/common/dump.js:13:8)
    at /Users/brent/Library/Mobile Documents/com~apple~CloudDocs/Programming/GitHub/ba/node_modules
/tesseract.js/src/common/worker.js:121:22
    at /Users/brent/Library/Mobile Documents/com~apple~CloudDocs/Programming/GitHub/ba/node_modules
/tesseract.js/src/common/worker.js:92:9
    at /Users/brent/Library/Mobile Documents/com~apple~CloudDocs/Programming/GitHub/ba/node_modules
/tesseract.js/src/node/lang.js:14:25
If this abort() is unexpected, build with -s ASSERTIONS=1 which can give more information.

Answer 1

我无法回答这个问题;然而，其他答案并未对此事做出太多启示。有关NodeJS和浏览器如何在许多功能上有显着差异的示例，请参阅http://www.jsbenchmarks.com/?anywhichway/lookup/master/benchmark.js/。请注意，虽然此站点上的浏览器结果来自多个访问者，而节点结果来自单个服务器，但隔离环境中的测试显示相同的内容。

Answer 2

通过更新Tesseract.Js软件解决了这个问题。

Node.js比使用Tesseract.Js的浏览器（Safari）慢20倍

2 个答案: