revlog: ignore empty trailing chunks when reading segments
When a merge commit creates an empty diff in the revlog, its offset may still
be quite far from the end of the previous chunk.
Skipping these empty chunks may reduce read size significantly.
In most cases, there is no gain, and in some cases, little gain.
On my clone of pypy, `hg manifest` reads 65% less bytes (96140 i/o 275943) for
revision 4260 by ignoring the only empty trailing diff.
For revision 2229, 35% (34557 i/o 53435)
Sadly, this is difficult to reproduce, as hg clone can make its own different
structure every time.
body {
margin: 0;
padding: 0;
background: white;
color: black;
font-family: sans-serif;
}
.container {
padding-left: 115px;
}
.main {
position: relative;
background: white;
padding: 2em 2em 2em 0;
}
#.main {
width: 98%;
}
.overflow {
width: 100%;
overflow: auto;
}
.menu {
width: 90px;
margin: 0;
font-size: 80%;
text-align: left;
position: absolute;
top: 20px;
left: 20px;
right: auto;
}
.menu ul {
list-style: none;
padding: 0;
margin: 10px 0 0 0;
border-left: 2px solid #999;
}
.menu li {
margin-bottom: 3px;
padding: 2px 4px;
background: white;
color: black;
font-weight: normal;
}
.menu li.active {
font-weight: bold;
}
.menu img {
width: 75px;
height: 90px;
border: 0;
}
div.atom-logo {
margin-top: 10px;
}
.atom-logo img{
width: 14px;
height: 14px;
border: 0;
}
.menu a { color: black; display: block; }
.search {
position: absolute;
top: .7em;
right: 2em;
}
form.search div#hint {
display: none;
position: absolute;
top: 40px;
right: 0px;
width: 190px;
padding: 5px;
background: #ffc;
font-size: 70%;
border: 1px solid yellow;
border-radius: 5px;
}
form.search:hover div#hint { display: block; }
a { text-decoration:none; }
.age { white-space:nowrap; }
.date { white-space:nowrap; }
.indexlinks { white-space:nowrap; }
.parity0,
.stripes4 > :nth-child(4n+1),
.stripes2 > :nth-child(2n+1) { background-color: #f0f0f0; }
.parity1,
.stripes4 > :nth-child(4n+3),
.stripes2 > :nth-child(2n+2) { background-color: white; }
.plusline { color: green; }
.minusline { color: #dc143c; } /* crimson */
.atline { color: purple; }
.diffstat-table {
margin-top: 1em;
}
.diffstat-file {
white-space: nowrap;
font-size: 90%;
}
.diffstat-total {
white-space: nowrap;
font-size: 90%;
}
.diffstat-graph {
width: 100%;
}
.diffstat-add {
background-color: green;
float: left;
}
.diffstat-remove {
background-color: red;
float: left;
}
.navigate {
text-align: right;
font-size: 60%;
margin: 1em 0;
}
.tag {
color: #999;
font-size: 70%;
font-weight: normal;
margin-left: .5em;
vertical-align: baseline;
}
.branchhead {
color: #000;
font-size: 80%;
font-weight: normal;
margin-left: .5em;
vertical-align: baseline;
}
ul#graphnodes .branchhead {
font-size: 75%;
}
.branchname {
color: #000;
font-size: 60%;
font-weight: normal;
margin-left: .5em;
vertical-align: baseline;
}
h3 .branchname {
font-size: 80%;
}
/* Common */
pre { margin: 0; }
h2 { font-size: 120%; border-bottom: 1px solid #999; }
h2 a { color: #000; }
h3 {
margin-top: +.7em;
font-size: 100%;
}
/* log and tags tables */
.bigtable {
border-bottom: 1px solid #999;
border-collapse: collapse;
font-size: 90%;
width: 100%;
font-weight: normal;
text-align: left;
}
.bigtable td {
vertical-align: top;
}
.bigtable th {
padding: 1px 4px;
border-bottom: 1px solid #999;
}
.bigtable tr { border: none; }
.bigtable .age { width: 7em; }
.bigtable .author { width: 15em; }
.bigtable .description { }
.bigtable .description .base { font-size: 70%; float: right; line-height: 1.66; }
.bigtable .node { width: 5em; font-family: monospace;}
.bigtable .permissions { width: 8em; text-align: left;}
.bigtable .size { width: 5em; text-align: right; }
.bigtable .annotate { text-align: right; }
.bigtable td.annotate { font-size: smaller; }
.bigtable td.source { font-size: inherit; }
tr.thisrev a { color:#999999; text-decoration: none; }
tr.thisrev td.source { color:#009900; }
td.annotate {
white-space: nowrap;
}
div.annotate-info {
z-index: 5;
display: none;
position: absolute;
background-color: #FFFFFF;
border: 1px solid #999;
text-align: left;
color: #000000;
padding: 5px;
}
div.annotate-info a { color: #0000FF; }
td.annotate:hover div.annotate-info { display: inline; }
#diffopts-form {
font-size: smaller;
color: #424242;
padding-bottom: 10px;
display: none;
}
.source, .sourcefirst {
font-family: monospace;
white-space: pre;
padding: 1px 4px;
font-size: 90%;
}
.sourcefirst { border-bottom: 1px solid #999; font-weight: bold; }
.source a { color: #999; font-size: smaller; font-family: monospace;}
.bottomline { border-bottom: 1px solid #999; }
.sourcelines {
font-size: 90%;
position: relative;
counter-reset: lineno;
}
.wrap > span {
white-space: pre-wrap;
}
.linewraptoggle {
float: right;
}
.diffblocks { counter-reset: lineno; }
.diffblocks > div { counter-increment: lineno; }
.sourcelines > span {
display: inline-block;
box-sizing: border-box;
width: 100%;
padding: 1px 0px 1px 5em;
counter-increment: lineno;
}
.sourcelines > span:before {
-moz-user-select: -moz-none;
-khtml-user-select: none;
-webkit-user-select: none;
-ms-user-select: none;
user-select: none;
display: inline-block;
margin-left: -6em;
width: 4em;
font-size: smaller;
color: #999;
text-align: right;
content: counters(lineno, ".");
float: left;
}
.sourcelines > span:target, tr:target td {
background-color: #bfdfff;
}
/* Followlines */
tbody.sourcelines > tr.followlines-selected,
pre.sourcelines > span.followlines-selected {
background-color: #99C7E9;
}
div#followlines {
background-color: #B7B7B7;
border: 1px solid #CCC;
border-radius: 5px;
padding: 4px;
position: fixed;
}
div.followlines-cancel {
text-align: right;
}
div.followlines-cancel > button {
line-height: 80%;
padding: 0;
border: 0;
border-radius: 2px;
background-color: inherit;
font-weight: bold;
}
div.followlines-cancel > button:hover {
color: #FFFFFF;
background-color: #CF1F1F;
}
div.followlines-link {
margin: 2px;
margin-top: 4px;
font-family: sans-serif;
}
.btn-followlines {
display: none;
cursor: pointer;
box-sizing: content-box;
font-size: 12px;
width: 13px;
height: 13px;
border-radius: 3px;
margin: 0px;
margin-top: -2px;
padding: 0px;
background-color: #E5FDE5;
border: 1px solid #9BC19B;
font-family: monospace;
text-align: center;
line-height: 5px;
}
tr .btn-followlines {
position: absolute;
}
span .btn-followlines {
float: left;
}
span.followlines-select .btn-followlines {
margin-left: -1.5em;
}
.btn-followlines:hover {
transform: scale(1.2, 1.2);
}
.btn-followlines .followlines-plus {
color: green;
}
.btn-followlines .followlines-minus {
color: red;
}
.btn-followlines-end {
background-color: #ffdcdc;
}
.sourcelines tr:hover .btn-followlines,
.sourcelines span.followlines-select:hover > .btn-followlines {
display: inline;
}
.btn-followlines-hidden,
.sourcelines tr:hover .btn-followlines-hidden {
display: none;
}
.sourcelines > a {
display: inline-block;
position: absolute;
left: 0px;
width: 4em;
height: 1em;
}
.fileline { font-family: monospace; }
.fileline img { border: 0; }
.tagEntry .closed { color: #99f; }
/* Changeset entry */
#changesetEntry {
border-collapse: collapse;
font-size: 90%;
width: 100%;
margin-bottom: 1em;
}
#changesetEntry th {
padding: 1px 4px;
width: 4em;
text-align: right;
font-weight: normal;
color: #999;
margin-right: .5em;
vertical-align: top;
}
div.description {
border-left: 2px solid #999;
margin: 1em 0 1em 0;
padding: .3em;
white-space: pre;
font-family: monospace;
}
/* Graph */
div#wrapper {
position: relative;
border-top: 1px solid black;
border-bottom: 1px solid black;
margin: 0;
padding: 0;
}
canvas {
position: absolute;
z-index: 5;
top: -0.7em;
margin: 0;
}
ul#graphnodes {
position: absolute;
z-index: 10;
top: -1.0em;
list-style: none inside none;
padding: 0;
}
ul#nodebgs {
list-style: none inside none;
padding: 0;
margin: 0;
top: -0.7em;
}
ul#graphnodes li, ul#nodebgs li {
height: 39px;
}
ul#graphnodes li .info {
display: block;
font-size: 70%;
position: relative;
top: -3px;
}
/* Comparison */
.legend {
padding: 1.5% 0 1.5% 0;
}
.legendinfo {
border: 1px solid #999;
font-size: 80%;
text-align: center;
padding: 0.5%;
}
.equal {
background-color: #ffffff;
}
.delete {
background-color: #faa;
color: #333;
}
.insert {
background-color: #ffa;
}
.replace {
background-color: #e8e8e8;
}
.header {
text-align: center;
}
.block {
border-top: 1px solid #999;
}
.breadcrumb {
color: gray;
}
.breadcrumb a {
color: blue;
}
.scroll-loading {
-webkit-animation: change_color 1s linear 0s infinite alternate;
-moz-animation: change_color 1s linear 0s infinite alternate;
-o-animation: change_color 1s linear 0s infinite alternate;
animation: change_color 1s linear 0s infinite alternate;
}
@-webkit-keyframes change_color {
from { background-color: #A0CEFF; } to { }
}
@-moz-keyframes change_color {
from { background-color: #A0CEFF; } to { }
}
@-o-keyframes change_color {
from { background-color: #A0CEFF; } to { }
}
@keyframes change_color {
from { background-color: #A0CEFF; } to { }
}
.scroll-loading-error {
background-color: #FFCCCC !important;
}