id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	launchpad_bug
1170	new-downloader performs badly when downloading a lot of data from a file	zooko		"I tried to download a movie file from Test Grid with Tahoe-LAFS v1.8.0c2 (new-downloader) and the file wouldn't download fast enough or smoothly enough to watch in a streaming fashion during download.

Some of Zooko's most recent measurements:

||= run =||= version =||= downloaded =||= download KBps =||= flags =||
||=[comment:18 101] =||=1.8.0c2 =||= 100 MB =||=  91 =||= =||
|| [comment:19 102]  || 1.7.1    ||  100 MB  ||  182  || ||
|| [comment:22 103]  || 1.7.1    ||  100 MB  ||  207  || ||
||=[comment:23 104] =||=1.8.0c2 =||= 100 MB =||=  82 =||= =||
|| [comment:25 105]  || 1.7.1    ||  100 MB  ||  211  || ||
|| [comment:35 109]  || 1.7.1    ||  100 MB  ||  228  || cProfile ||
||=[comment:36 110] =||=1.8.0c2 =||= 100 MB =||= 113 =||=cProfile =||
||=[comment:47 111] =||=1.8.0c2 =||= 413 MB =||=  19 =||=spanstrace =||
||=[comment:49 112] =||=1.8.0c2 =||= 456 MB =||= 113 =||=spanstrace, [attachment:spans.py.diff spans.py.diff] =||
|| [comment:52 113]  || 1.7.1    ||  543 MB  ||  241  || on office network ||
||=[comment:57 114] =||=1.8.0c2 =||= 456 MB =||= 147 =||=[attachment:spans.py.diff spans.py.diff] + comment:54 =||
|| [comment:58 115]  || 1.7.1    ||  456 MB  ||  224  || ||
||=[comment:59 116] =||=1.8.0c2 =||= 314 MB =||= 154 =||=[attachment:spans.py.diff spans.py.diff] + comment:54 =||
||=[comment:60 117] =||=1.8.0c2 =||=  36 MB =||= 160 =||=cProfile [attachment:spans.py.diff spans.py.diff] + comment:54 =||
||=[comment:64 118] =||=1.8.0c2 =||= 1490 MB =||= 158 =||=cProfile [attachment:spans.py.diff spans.py.diff] + comment:54 =||
|| [attachment:runs-119,120,121-curl-stdout.txt 119]  || 1.7.1    ||  543 MB ||   99 || on office network, noflog                         ||
||=[attachment:runs-119,120,121-curl-stdout.txt 120] =||=1.8.0c2 =||= 543 MB =||=  319 =||=on office network, noflog, [attachment:spans.py.diff spans.py.diff] + comment:54 =||
|| [attachment:runs-119,120,121-curl-stdout.txt 121] || 1.7.1 || 543 MB ||   252 || on office network, noflog ||
||=[attachment:runs-122,123,124,125,126,127-curl-stdout.4.txt 122] =||=1.8.0c2 =||= 1490 MB =||= 157 =||=noflog, [attachment:spans.py.diff spans.py.diff] + comment:54, nologging in immutable/download/share.py =||
||= [attachment:runs-122,123,124,125,126,127-curl-stdout.4.txt 123] =||=1.8.0c2 =||= 100 MB =||= 242 =||=noflog, [attachment:spans.py.diff spans.py.diff] + comment:54, nologging in immutable/download/*.py =||
|| [attachment:runs-122,123,124,125,126,127-curl-stdout.4.txt 124] || 1.7.1   || 100 MB || 219 || noflog   ||
||=[attachment:runs-122,123,124,125,126,127-curl-stdout.4.txt 125] =||=1.8.0c2 =||= 100 MB =||= 161 =||=noflog, [attachment:spans.py.diff spans.py.diff] + comment:54, nologging in immutable/download/*.py =||
|| [attachment:runs-122,123,124,125,126,127-curl-stdout.4.txt 126] || 1.7.1   || 100 MB || 223 || noflog   ||
||=[attachment:runs-122,123,124,125,126,127-curl-stdout.4.txt 127] =||=1.8.0c2 =||= 100 MB =||= 155 =||=noflog, [attachment:spans.py.diff spans.py.diff] + comment:54, nologging in immutable/download/*.py =||
|| [attachment:runs-129,130,131,132,133,134,135,136,137,138,139-curl-stdout.txt 129] || 1.8.0c2 || 100 MB || 291 || on office network, noflog, [attachment:1170-combo.diff 1170-combo.diff]                         ||
|| [attachment:runs-129,130,131,132,133,134,135,136,137,138,139-curl-stdout.txt 130] || 1.8.0c2 || 100 MB || 179 || on office network, noflog, [attachment:1170-combo.diff 1170-combo.diff]                         ||
|| [attachment:runs-129,130,131,132,133,134,135,136,137,138,139-curl-stdout.txt 131] || 1.8.0c2 || 100 MB || 276 || on office network, noflog, [attachment:1170-combo.diff 1170-combo.diff]                         ||
|| [attachment:runs-129,130,131,132,133,134,135,136,137,138,139-curl-stdout.txt 132] || 1.8.0c2 || 100 MB || 179 || on office network, noflog, [attachment:1170-combo.diff 1170-combo.diff]                         ||
|| [attachment:runs-129,130,131,132,133,134,135,136,137,138,139-curl-stdout.txt 133] || 1.8.0c2 || 100 MB || 279 || on office network, noflog, [attachment:1170-combo.diff 1170-combo.diff]                         ||
|| [attachment:runs-129,130,131,132,133,134,135,136,137,138,139-curl-stdout.txt 134] || 1.8.0c2 || 100 MB || 262 || on office network, noflog, [attachment:1170-combo.diff 1170-combo.diff]                         ||
|| [attachment:runs-129,130,131,132,133,134,135,136,137,138,139-curl-stdout.txt 135] || 1.8.0c2 || 100 MB || 180 || on office network, noflog, [attachment:1170-combo.diff 1170-combo.diff]                         ||
|| [attachment:runs-129,130,131,132,133,134,135,136,137,138,139-curl-stdout.txt 136] || 1.8.0c2 || 100 MB || 284 || on office network, noflog, [attachment:1170-combo.diff 1170-combo.diff]                         ||
|| [attachment:runs-129,130,131,132,133,134,135,136,137,138,139-curl-stdout.txt 137] || 1.8.0c2 || 100 MB || 286 || on office network, noflog, [attachment:1170-combo.diff 1170-combo.diff]                         ||
|| [attachment:runs-129,130,131,132,133,134,135,136,137,138,139-curl-stdout.txt 138] || 1.7.1   || 867 MB || 265 || on office network, noflog                          ||
|| [attachment:runs-129,130,131,132,133,134,135,136,137,138,139-curl-stdout.txt 139] || 1.8.0c2 || 866 MB || 169 || on office network, noflog, [attachment:1170-combo.diff 1170-combo.diff]                         ||
"	defect	new	critical	1.8.0	code-network	1.8β		immutable download performance regression