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parse_counters: cache previous reply and skip processing of unchanged rows (better implementation)

This commit is contained in:
Andrew Dolgov 2017-01-22 19:38:07 +03:00
parent a4e04c498f
commit d5f74019ac
1 changed files with 33 additions and 7 deletions
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40
js/feedlist.js
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@ -254,15 +254,41 @@ function request_counters(force) {
} }
} }
// NOTE: this implementation is incomplete
// for general objects but good enough for counters
// http://adripofjavascript.com/blog/drips/object-equality-in-javascript.html
function counter_is_equal(a, b) {
// Create arrays of property names
var aProps = Object.getOwnPropertyNames(a);
var bProps = Object.getOwnPropertyNames(b);
// If number of properties is different,
// objects are not equivalent
if (aProps.length != bProps.length) {
return false;
}
for (var i = 0; i < aProps.length; i++) {
var propName = aProps[i];
// If values of same property are not equal,
// objects are not equivalent
if (a[propName] !== b[propName]) {
return false;
}
}
// If we made it this far, objects
// are considered equivalent
return true;
}
function parse_counters(elems) { function parse_counters(elems) {
try { try {
for (var l = 0; l < elems.length; l++) { for (var l = 0; l < elems.length; l++) {
if (_counters_prev[l] && if (_counters_prev[l] && counter_is_equal(elems[l], _counters_prev[l])) {
_counters_prev[l].id == elems[l].id &&
_counters_prev[l].updated == elems[l].updated &&
_counters_prev[l].counter == elems[l].counter) {
continue; continue;
} }
@ -285,9 +311,9 @@ function parse_counters(elems) {
continue; continue;
} }
if (getFeedUnread(id, (kind == "cat")) != ctr || /*if (getFeedUnread(id, (kind == "cat")) != ctr ||
(kind == "cat")) { (kind == "cat")) {
} }*/
setFeedUnread(id, (kind == "cat"), ctr); setFeedUnread(id, (kind == "cat"), ctr);
setFeedValue(id, (kind == "cat"), 'auxcounter', auxctr); setFeedValue(id, (kind == "cat"), 'auxcounter', auxctr);