<html><head><style>body{font-family:Helvetica,Arial;font-size:13px}</style></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;">Hi all-</div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;"><br></div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;">The following snippet appears to leak memory badly (about 10 MB per execution):</div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;"><br></div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;"><div id="bloop_customfont" style="margin: 0px;">P = randint(0,2,(30,13))</div><div id="bloop_customfont" style="margin: 0px;"><br></div><div id="bloop_customfont" style="margin: 0px;">for i in range(50):</div><div id="bloop_customfont" style="margin: 0px;"> print "\r", i, "/", 50</div><div id="bloop_customfont" style="margin: 0px;"> for ai in ndindex((2,)*13):</div><div id="bloop_customfont" style="margin: 0px;"> j = np.sum(P.dot(ai))</div><div id="bloop_customfont" style="margin: 0px;"><br></div><div id="bloop_customfont" style="margin: 0px;">If instead you execute (no np.sum call):</div><div id="bloop_customfont" style="margin: 0px;"><br></div><div id="bloop_customfont" style="margin: 0px;"><div id="bloop_customfont" style="margin: 0px;">P = randint(0,2,(30,13))</div><div id="bloop_customfont" style="margin: 0px;"><br></div><div id="bloop_customfont" style="margin: 0px;">for i in range(50):</div><div id="bloop_customfont" style="margin: 0px;"> print "\r", i, "/", 50</div><div id="bloop_customfont" style="margin: 0px;"> for ai in ndindex((2,)*13):</div><div id="bloop_customfont" style="margin: 0px;"> j = P.dot(ai)</div><div id="bloop_customfont" style="margin: 0px;"><br></div><div id="bloop_customfont" style="margin: 0px;">There is no leak. </div></div><div id="bloop_customfont" style="margin: 0px;"><br></div></div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;">Any thoughts? I’m stumped.</div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;"><br></div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;">Best, Chris</div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;"><br></div> <div id="bloop_sign_1391148946597726976" class="bloop_sign"><span style="font-family:helvetica,arial;font-size:13px"></span>-- <br>Chris Laumann<br><span>Sent with Airmail</span></div></body></html>