Count viewers fewer times when doing mass-sending, as it seems to be a bit expensive...

diff --git a/www/serve-analysis.js b/www/serve-analysis.js
index fcb91fa83974ee51deef8f538e4666aed228ec2d..4f0d2f010376df9748333a58a985c0fbbf1bcd21 100644 (file)
--- a/www/serve-analysis.js
+++ b/www/serve-analysis.js
@@ -54,10 +54,13 @@ var reread_file = function(event, filename) {
        });
 }
 var possibly_wakeup_clients = function() {
+       var num_viewers = count_viewers();
        for (var i in sleeping_clients) {
                clearTimeout(sleeping_clients[i].timer);
                mark_recently_seen(sleeping_clients[i].unique);
-               send_json(sleeping_clients[i].response, sleeping_clients[i].accept_gzip);
+               send_json(sleeping_clients[i].response,
+                         sleeping_clients[i].accept_gzip,
+                         num_viewers);
        }
        sleeping_clients = {};
 }
@@ -68,11 +71,11 @@ var send_404 = function(response) {
        response.write('Something went wrong. Sorry.');
        response.end();
 }
-var send_json = function(response, accept_gzip) {
+var send_json = function(response, accept_gzip, num_viewers) {
        var headers = {
                'Content-Type': 'text/json',
                'X-Remoteglot-Last-Modified': json_last_modified,
-               'X-Remoteglot-Num-Viewers': count_viewers(),
+               'X-Remoteglot-Num-Viewers': num_viewers,
                'Access-Control-Allow-Origin': 'http://analysis.sesse.net',
                'Access-Control-Expose-Headers': 'X-Remoteglot-Last-Modified, X-Remoteglot-Num-Viewers',
                'Expires': 'Mon, 01 Jan 1970 00:00:00 UTC',
@@ -90,7 +93,7 @@ var send_json = function(response, accept_gzip) {
 }
 var timeout_client = function(client) {
        mark_recently_seen(client.unique);
-       send_json(client.response, client.accept_gzip);
+       send_json(client.response, client.accept_gzip, count_viewers());
        delete sleeping_clients[client.request_id];
 }
 var mark_recently_seen = function(unique) {
@@ -155,7 +158,7 @@ server.on('request', function(request, response) {
        // If we already have something newer than what the user has,
        // just send it out and be done with it.
        if (json_last_modified !== undefined && (!ims || json_last_modified > ims)) {
-               send_json(response, accept_gzip);
+               send_json(response, accept_gzip, count_viewers());
                return;
        }