diff --git a/bin/txt-to-sql-run.js b/bin/txt-to-sql-run.js
index 8cd4d91..aea9378 100644
--- a/bin/txt-to-sql-run.js
+++ b/bin/txt-to-sql-run.js
@@ -6,10 +6,12 @@ var program = require('commander');
 var txtToSql = require('../lib/txt-to-sql.js');
 var Promises = require('best-promise');
 var fs = require('fs-promise');
+var fsSync = require('fs');
 var Path = require('path');
 var miniTools = require('mini-tools');
 var jsYaml = require('js-yaml');
-var changing = require('best-globals').changing;   
+var changing = require('best-globals').changing;
+var readline = require('readline');
 
 function getOutputDir(inFile) {
     return Promises.start(function() {
@@ -102,9 +104,61 @@ function doGenerate(params, inputYaml, create, inputName) {
     });
 }
 
-function doFast(params, inputName) {
+function fastProcessEncodingOptions(info) {
+    return txtToSql.getEncoding(info.rawTable).then(function(encoding) {
+        info.inputEncodingDetected = encoding;
+        if(! info.opts.inputEncoding) { info.opts.inputEncoding = info.inputEncodingDetected; }
+        if(! info.opts.outputEncoding) { info.opts.outputEncoding = info.inputEncodingDetected; }
+        //var inFromToString = info.rawTable.toString("utf8");
+        if(info.opts.inputEncoding==='ANSI') {
+            // if(inFromToString.substr(1).indexOf('\uFFFD')<0) {
+                // throw new Error('ansi -> utf8: replacement character not found');
+            // }
+            //info.decodedBuffer = iconv.decode(info.rawTable, "win1252");
+            // if(txtToSql.compareBuffers(info.decodedBuffer, info.rawTable) === -1) {
+                // throw new Error('ansi -> utf8: no conversion performed');
+            // }
+        } else if(info.opts.inputEncoding==='UTF8') {
+            //info.decodedBuffer = inFromToString;
+            // var result = txtToSql.compareBuffers(info.rawTable, new Buffer(info.decodedBuffer, 'utf8'));
+            // if(result !== -1) {
+                // throw new Error('utf8 check failed in position: '+result);
+            // }
+        } else {
+            //info.decodedBuffer = inFromToString;
+        }
+        return info;
+    });
+}
+
+function doFast(params, inputBase) {
+    var inStream, outStream;
+    var rl;
     return Promise.resolve().then(function() {
-        return "not yet";
+        return txtToSql.verifyInputParams(params);
+    }).then(fastProcessEncodingOptions)
+      .then(function(info) {
+        //console.log("info", info);
+        inStream = fsSync.createReadStream(inputBase+'.txt', {encoding:'utf8'});
+        outStream = fsSync.createWriteStream(inputBase+'.sql', {encoding:'utf8'});
+        rl = readline.createInterface({
+            input: inStream,
+            terminal: false
+        });
+        rl.on('line', function(line) {
+            console.log("line", line);
+            if(! info.headers) {
+                info.headers = line;
+                txtToSql.determineSeparator(info);
+                txtToSql.separateColumns(info);
+            } else {
+                
+            }
+            //outStream.write(line+'\n')
+        });
+        rl.on('close', function() {
+          console.log("info", info);  
+        });
     });
 }
 
@@ -130,7 +184,7 @@ getOutputDir(cmdParams.input).then(function(dir) {
     }).then(function(rawInput) {
         params.rawTable = rawInput;
         if(cmdParams.fast) {
-            return doFast(params, inputName);
+            return doFast(params, inputBase);
         } else if (cmdParams.prepare) {
             return doPrepare(params, inputYaml, createInputYaml);
         } else {
diff --git a/lib/txt-to-sql.js b/lib/txt-to-sql.js
index 59e758c..789f296 100644
--- a/lib/txt-to-sql.js
+++ b/lib/txt-to-sql.js
@@ -107,36 +107,6 @@ function throwIfErrors(errors) {
     }
 }
 
-function getEncodingSinc(buf) {
-    // si es un continuador
-    function cont(code) { return code>=128 && code<192; }
-    function case1(code) { return code>=192 && code<224; }
-    function case2(code) { return code>=224 && code<240; }
-    function case3(code) { return code>=240 && code<248; }
-    var type = 'ASCII7';
-    var i=0;
-    var code;
-    while(i<buf.length) {
-        if(buf[i]>127) {
-            type = 'UTF8';
-            if(case1(buf[i]) && cont(buf[i+1])) { i+=2; continue; }
-            if(case2(buf[i]) && cont(buf[i+1]) && cont(buf[i+2])) { i+=3; continue; }
-            if(case3(buf[i]) && cont(buf[i+1]) && cont(buf[i+2]) && cont(buf[i+3])) { i+=4; continue; }
-            type = 'ANSI';
-            break;
-        } else {
-            i+=1;
-        }
-    }
-    return type;
-}
-
-function getEncoding(buf) {
-    return Promise.resolve().then(function() {
-        return getEncodingSinc(buf);
-    });
-}
-
 txtToSql.defaultOpts = {
     columnNamesFormat: 'lowercased_names',
     separator: false,
@@ -207,6 +177,36 @@ function verifyInputParams(info){
     return info;
 }
 
+function getEncodingSinc(buf) {
+    // si es un continuador
+    function cont(code) { return code>=128 && code<192; }
+    function case1(code) { return code>=192 && code<224; }
+    function case2(code) { return code>=224 && code<240; }
+    function case3(code) { return code>=240 && code<248; }
+    var type = 'ASCII7';
+    var i=0;
+    var code;
+    while(i<buf.length) {
+        if(buf[i]>127) {
+            type = 'UTF8';
+            if(case1(buf[i]) && cont(buf[i+1])) { i+=2; continue; }
+            if(case2(buf[i]) && cont(buf[i+1]) && cont(buf[i+2])) { i+=3; continue; }
+            if(case3(buf[i]) && cont(buf[i+1]) && cont(buf[i+2]) && cont(buf[i+3])) { i+=4; continue; }
+            type = 'ANSI';
+            break;
+        } else {
+            i+=1;
+        }
+    }
+    return type;
+}
+
+function getEncoding(buf) {
+    return Promise.resolve().then(function() {
+        return getEncodingSinc(buf);
+    });
+}
+
 function compareBuffers(one, two) {
     var max = Math.max(one.length, two.length);
     for(var i=0; i<max; i++){ if(one[i]!==two[i]) { return i; } }
@@ -276,6 +276,10 @@ function separateColumns(info){
             column.name = info.opts.columns[index].name;
         });
     }
+    return info;
+}
+
+function separateRows(info) {
     info.rows = info.lines.filter(function(line){ return line.trim()!==""; })
                           .map(function(line){ return line.split(info.opts.separator);});
     return info;
@@ -539,6 +543,7 @@ function setup(info) {
         .then(separateLines)
         .then(determineSeparator)
         .then(separateColumns)
+        .then(separateRows)
         .then(verifyColumnCount)
         .then(transformNames)
         .then(verifyColumnNames)
@@ -587,4 +592,10 @@ txtToSql.getEncodingSinc = getEncodingSinc;
 txtToSql.getEncoding = getEncoding;
 txtToSql.compareBuffers = compareBuffers;
 
+// for --fast
+txtToSql.verifyInputParams = verifyInputParams;
+txtToSql.getEncoding = getEncoding;
+txtToSql.determineSeparator = determineSeparator;
+txtToSql.separateColumns = separateColumns;
+
 module.exports = txtToSql;
\ No newline at end of file
diff --git a/web/txt-to-sql.js b/web/txt-to-sql.js
index 59e758c..789f296 100644
--- a/web/txt-to-sql.js
+++ b/web/txt-to-sql.js
@@ -107,36 +107,6 @@ function throwIfErrors(errors) {
     }
 }
 
-function getEncodingSinc(buf) {
-    // si es un continuador
-    function cont(code) { return code>=128 && code<192; }
-    function case1(code) { return code>=192 && code<224; }
-    function case2(code) { return code>=224 && code<240; }
-    function case3(code) { return code>=240 && code<248; }
-    var type = 'ASCII7';
-    var i=0;
-    var code;
-    while(i<buf.length) {
-        if(buf[i]>127) {
-            type = 'UTF8';
-            if(case1(buf[i]) && cont(buf[i+1])) { i+=2; continue; }
-            if(case2(buf[i]) && cont(buf[i+1]) && cont(buf[i+2])) { i+=3; continue; }
-            if(case3(buf[i]) && cont(buf[i+1]) && cont(buf[i+2]) && cont(buf[i+3])) { i+=4; continue; }
-            type = 'ANSI';
-            break;
-        } else {
-            i+=1;
-        }
-    }
-    return type;
-}
-
-function getEncoding(buf) {
-    return Promise.resolve().then(function() {
-        return getEncodingSinc(buf);
-    });
-}
-
 txtToSql.defaultOpts = {
     columnNamesFormat: 'lowercased_names',
     separator: false,
@@ -207,6 +177,36 @@ function verifyInputParams(info){
     return info;
 }
 
+function getEncodingSinc(buf) {
+    // si es un continuador
+    function cont(code) { return code>=128 && code<192; }
+    function case1(code) { return code>=192 && code<224; }
+    function case2(code) { return code>=224 && code<240; }
+    function case3(code) { return code>=240 && code<248; }
+    var type = 'ASCII7';
+    var i=0;
+    var code;
+    while(i<buf.length) {
+        if(buf[i]>127) {
+            type = 'UTF8';
+            if(case1(buf[i]) && cont(buf[i+1])) { i+=2; continue; }
+            if(case2(buf[i]) && cont(buf[i+1]) && cont(buf[i+2])) { i+=3; continue; }
+            if(case3(buf[i]) && cont(buf[i+1]) && cont(buf[i+2]) && cont(buf[i+3])) { i+=4; continue; }
+            type = 'ANSI';
+            break;
+        } else {
+            i+=1;
+        }
+    }
+    return type;
+}
+
+function getEncoding(buf) {
+    return Promise.resolve().then(function() {
+        return getEncodingSinc(buf);
+    });
+}
+
 function compareBuffers(one, two) {
     var max = Math.max(one.length, two.length);
     for(var i=0; i<max; i++){ if(one[i]!==two[i]) { return i; } }
@@ -276,6 +276,10 @@ function separateColumns(info){
             column.name = info.opts.columns[index].name;
         });
     }
+    return info;
+}
+
+function separateRows(info) {
     info.rows = info.lines.filter(function(line){ return line.trim()!==""; })
                           .map(function(line){ return line.split(info.opts.separator);});
     return info;
@@ -539,6 +543,7 @@ function setup(info) {
         .then(separateLines)
         .then(determineSeparator)
         .then(separateColumns)
+        .then(separateRows)
         .then(verifyColumnCount)
         .then(transformNames)
         .then(verifyColumnNames)
@@ -587,4 +592,10 @@ txtToSql.getEncodingSinc = getEncodingSinc;
 txtToSql.getEncoding = getEncoding;
 txtToSql.compareBuffers = compareBuffers;
 
+// for --fast
+txtToSql.verifyInputParams = verifyInputParams;
+txtToSql.getEncoding = getEncoding;
+txtToSql.determineSeparator = determineSeparator;
+txtToSql.separateColumns = separateColumns;
+
 module.exports = txtToSql;
\ No newline at end of file