diff --git a/html/can.js b/html/can.js
new file mode 100644
index 00000000..06882e01
--- /dev/null
+++ b/html/can.js
@@ -0,0 +1,54 @@
+function hasCan(){var c=document.getElementById('can');return !!(c.getContext&&c.getContext('2d'));}
+function sep(d){ans={};var ar=d.split("\t");var l=ar.length;for(var i=0;i<l;i++){var e=ar[i].indexOf('=');ans[ar[i].substr(0,e)]=ar[i].substr(e+1)};return ans}
+function gch(z,zm,zo){if(z<0){return 0}if(z>(zm-1)){return(zm-1)}return z}
+function gchx(c,x){return gch(x*c['xm']+c['xo'],c['ctx'].canvas.width)}
+function gchy(c,y){return gch((1-y)*c['ym']+c['yo'],c['ctx'].canvas.height)}
+function gx0(c){return -c['xo']/c['xm']};
+function gy0(c){return -c['yo']/c['ym']};
+function gto(c,xo,yo){c['xo']+=xo;c['yo']+=yo}
+function gts(c,xs,ys){c['xm']*=xs;c['ym']*=ys}
+function gtso(c,xs,ys){gto(c,c['xm']*(1.0-xs)/2.0,c['ym']*(1.0-ys)/2.0);gts(c,xs,ys)}
+function gfs(c,bg){c['ctx'].fillStyle=bg}
+function gss(c,fg){c['ctx'].strokeStyle=fg}
+function glw(c,pct){c['ctx'].lineWidth=pct*c['ym']/100.0}
+function glwr(c,rat){c['ctx'].lineWidth*=rat}
+function gfz(c,x,y,ox,oy,t,co,a){gfs(c,co);c['ctx'].textAlign=a;c['ctx'].fillText(t,gchx(c,x)+ox,gchy(c,y)-oy)}
+function gbe(c,x,y){c['ctx'].beginPath();c['ctx'].moveTo(gchx(c,x),gchy(c,y))}
+function gln(c,x,y){c['ctx'].lineTo(gchx(c,x),gchy(c,y))}
+function glm(c,x,y){c['ctx'].moveTo(gchx(c,x),gchy(c,y))}
+function gle(c){c['ctx'].closePath()}
+function gfl(c){c['ctx'].fill()}
+function gst(c){c['ctx'].stroke()}
+function gfi(c){gle(c);gst(c)}
+function gbd(c){gbe(c,0,0);gln(c,1,0);gln(c,1,1);gln(c,0,1);gle(c);gfl(c);gst(c)}
+function ggr(c,xs,ys,yt,xn,x0,x1,y0,y1,ar,nx,vx,vy,av){
+gtso(c,xs,ys);
+gss(c,'black');glw(c,0.25);
+gbe(c,0,1);gln(c,0,0);gln(c,1,0);gst(c);
+glwr(c,0.1);
+var hi=c['ctx'].measureText('M').width;
+var wi=c['ctx'].measureText('1').width;
+for(var i=0;i<11;i++){var y=i/10.0;gbe(c,-0.01,y);gln(c,1,y);gst(c);var t=''+(((y1-y0)*i/10+y0).toFixed(2));gfz(c,0,y,-wi,0,t,'black','end')}
+gfz(c,gx0(c),0.55,wi,0,yt,'#0080ff','left');
+var m=Math.round(0.5+xn/20.0);
+var f=1;
+for(var i=0;i<xn;i++){var n=ar[nx+i];var x=ar[vx+i];var xo=(x-x0)/(x1-x0);if((i<(xn-1))&&(i%m)==0){gbe(c,xo,0);gln(c,xo,-0.01);gst(c);gfz(c,xo,0,0,-hi*1.5,n,'#00a050','center')}}
+glw(c,0.1);
+for(var i=0;i<xn;i++){var x=ar[vx+i];var y=ar[vy+i];var xo=(x-x0)/(x1-x0);var yo=(y-y0)/(y1-y0);if(f==1){gbe(c,xo,yo);f=0}else{gln(c,xo,yo)}}gst(c);
+glw(c,0.2);
+gss(c,'red');
+var y=(av-y0)/(y1-y0);
+gbe(c,0,y);gln(c,1,y);gst(c);
+}
+function sn(i,shi){if(shi.indexOf(' Shift ')<0){return ''+(i%10)}else{return shi.replace(/.* ([a-z])[a-z]*$/,'$1')}}
+function gc(c){c['can']=document.getElementById('can');c['ctx']=c['can'].getContext('2d');c['wx']=window.innerWidth;c['wy']=window.innerHeight;c['xm']=c['wx']*0.9;c['ym']=c['wy']*0.8;if(c['ym']>c['xm']){c['ym']=c['xm']}c['xo']=0.0;c['yo']=0.0;c['ctx'].canvas.width=c['xm'];c['ctx'].canvas.height=c['ym']}
+function gdrw(d){var c={};gc(c);
+gfs(c,'white');gss(c,'black');glw(c,1);gbd(c);
+var rows=d['rows'];var ymin=-1;var ymax=0;var xmin=-1;var xmax=0;
+var tda=0;
+for(var i=0;i<rows;i++){var s=parseFloat(d['start:'+i]);var e=parseFloat(d['end:'+i]);var da=parseFloat(d['diffacc:'+i]);tda+=da;var ths=(da/(e-s))*Math.pow(2,32)/Math.pow(10,12);d['ths:'+i]=ths;if(ymin==-1||ymin>ths){ymin=ths}if(ths>ymax)ymax=ths;d['nx:'+i]=sn(i,d['shift:'+i]);if(xmin==-1||xmin>s){xmin=s}if(xmax<e){xmax=e}d['vx:'+i]=(s+e)/2.0};
+var tav=(tda/(xmax-xmin))*Math.pow(2,32)/Math.pow(10,12);
+var p5=(ymax-ymin)*0.05;ymax+=p5;ymin-=p5;if(ymin<0){ymin=0}
+ggr(c,0.8,0.9,'THs',rows,xmin,xmax,0,ymax,d,'nx:','vx:','ths:',tav);
+}
+function dodrw(d){if(hasCan()){gdrw(sep(d))}}
diff --git a/pool/db.php b/pool/db.php
index 6c85e9cd..908c020b 100644
--- a/pool/db.php
+++ b/pool/db.php
@@ -5,13 +5,20 @@ include_once('base.php');
 #
 # List of db functions to call and get the results back from ckdb
 # From homeInfo() and the rest after that
-# The result is an array of all ckdb result field names and their values
+# The repDecode() result is an array of all ckdb result field names and
+#  their values
 # Also included:
 #	['ID'] the id sent
 #	['STAMP'] the ckdb reply timestamp
 #	['STATUS'] the ckdb reply status (!'ok' = error)
-#	['ERROR'] if status not 'ok' the error message reply
+#	['ERROR'] if status != 'ok', the error message reply
 # The reply is false if the ckdb return data was corrupt
+# The repData() result is:
+#	['ID'] the id sent
+#	['STAMP'] the ckdb reply timestamp
+#	['STATUS'] the ckdb reply status (!'ok' = error)
+#	['DATA'] the rest of the ckdb reply, or '' on error
+#	['ERROR'] if status not 'ok', the error message reply
 #
 global $send_sep, $fld_sep, $val_sep;
 $send_sep = '.';
@@ -65,6 +72,38 @@ function repDecode($rep)
  return $ans;
 }
 #
+function repData($rep)
+{
+ global $send_sep;
+
+ $fix = preg_replace("/[\n\r]*$/",'',$rep);
+ $major = explode($send_sep, $fix, 4);
+ if (count($major) < 3)
+	return false;
+
+ $ans = array();
+
+ $ans['ID'] = $major[0];
+ $ans['STAMP'] = $major[1];
+ $ans['STATUS'] = $major[2];
+ $ans['DATA'] = '';
+ if ($major[2] == 'ok')
+ {
+	$ans['ERROR'] = null;
+	if (isset($major[3]))
+		$ans['DATA'] = $major[3];
+ }
+ else
+ {
+	if (isset($major[3]))
+		$ans['ERROR'] = $major[3];
+	else
+		$ans['ERROR'] = 'system error';
+ }
+
+ return $ans;
+}
+#
 # Convenience function
 function zeip()
 {
@@ -282,6 +321,18 @@ function getShifts($user)
  return repDecode($rep);
 }
 #
+function getShiftData($user)
+{
+ if ($user == false)
+	showIndex();
+ $flds = array('username' => $user);
+ $msg = msgEncode('shifts', 'shift', $flds, $user);
+ $rep = sendsockreply('getShifts', $msg);
+ if (!$rep)
+	dbdown();
+ return repData($rep);
+}
+#
 function getBlocks($user)
 {
  if ($user == false)
diff --git a/pool/page_blocks.php b/pool/page_blocks.php
index ba07472f..c294ba4c 100644
--- a/pool/page_blocks.php
+++ b/pool/page_blocks.php
@@ -182,11 +182,15 @@ function doblocks($data, $user)
 		if ($stat == 'Orphan')
 			$stara = '<span class=st1>*</span>';
 
-		$statsconf = $ans['statsconf:'.$i];
-		if ($statsconf == 'Y')
-			$approx = '';
+		if (isset($ans['statsconf:'.$i]))
+		{
+			if ($ans['statsconf:'.$i] == 'Y')
+				$approx = '';
+			else
+				$approx = '~';
+		}
 		else
-			$approx = '~';
+			$approx = '';
 
 		$diffacc = $ans['diffacc:'.$i];
 		$acc = number_format($diffacc, 0);
diff --git a/pool/page_usperf.php b/pool/page_usperf.php
new file mode 100644
index 00000000..12e31e39
--- /dev/null
+++ b/pool/page_usperf.php
@@ -0,0 +1,26 @@
+<?php
+#
+function dousperf($data, $user)
+{
+ $ans = getShiftData($user);
+
+ $pg = '<h1>User Shift Performance</h1><br>';
+ if ($ans['STATUS'] == 'ok' and $ans['DATA'] != '')
+ {
+	$pg .= "<canvas id=can width=1 height=1>";
+	$pg .= "A graph will show here if your browser supports html5/canvas";
+	$pg .= "</canvas>\n";
+	$data = str_replace(array("\\","'"), array("\\\\","\\'"), $ans['DATA']);
+	$pg .= "<script src='/can.js'></script>\n";
+	$pg .= "<script type='text/javascript'>dodrw('$data');</script>\n";
+ }
+
+ return $pg;
+}
+#
+function show_usperf($info, $page, $menu, $name, $user)
+{
+ gopage($info, NULL, 'dousperf', $page, $menu, $name, $user);
+}
+#
+?>
diff --git a/pool/prime.php b/pool/prime.php
index 6ee31cfb..9c0d2706 100644
--- a/pool/prime.php
+++ b/pool/prime.php
@@ -76,8 +76,9 @@ function check()
 		'User Settings' => 'userset'
 	),
 	'Workers' => array(
-		'Shifts ' => 'shifts',
-		'Workers ' => 'workers',
+		'Shifts' => 'shifts',
+		'Shift Graph' => 'usperf',
+		'Workers' => 'workers',
 		'Management' => 'workmgt',
 	),
 	'Pool' => array(