From 0009e31bd3eafc7d2be1439597df118d9c24c071 Mon Sep 17 00:00:00 2001
From: ed <s@ocv.me>
Date: Thu, 2 Mar 2023 22:35:32 +0000
Subject: [PATCH] heavy webworker load can park the main thread of a background
 chrome tab for 10sec; piggyback some pokes off postmessage

---
 copyparty/web/up2k.js | 13 +++++++++++--
 copyparty/web/util.js |  5 +++--
 2 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/copyparty/web/up2k.js b/copyparty/web/up2k.js
index 89b1c993..96651460 100644
--- a/copyparty/web/up2k.js
+++ b/copyparty/web/up2k.js
@@ -114,10 +114,10 @@ function up2k_flagbus() {
             do_take(now);
             return;
         }
-        if (flag.owner && now - flag.owner[1] > 5000) {
+        if (flag.owner && now - flag.owner[1] > 12000) {
             flag.owner = null;
         }
-        if (flag.wants && now - flag.wants[1] > 5000) {
+        if (flag.wants && now - flag.wants[1] > 12000) {
             flag.wants = null;
         }
         if (!flag.owner && !flag.wants) {
@@ -772,6 +772,7 @@ function fsearch_explain(n) {
 
 function up2k_init(subtle) {
     var r = {
+        "tact": Date.now(),
         "init_deps": init_deps,
         "set_fsearch": set_fsearch,
         "gotallfiles": [gotallfiles]  // hooks
@@ -1647,8 +1648,14 @@ function up2k_init(subtle) {
             running = true;
             while (true) {
                 var now = Date.now(),
+                    blocktime = now - r.tact,
                     is_busy = st.car < st.files.length;
 
+                if (blocktime > 2500)
+                    console.log('main thread blocked for ' + blocktime);
+
+                r.tact = now;
+
                 if (was_busy && !is_busy) {
                     for (var a = 0; a < st.files.length; a++) {
                         var t = st.files[a];
@@ -2043,6 +2050,8 @@ function up2k_init(subtle) {
             nbusy++;
             reading++;
             nchunk++;
+            if (Date.now() - up2k.tact > 1500)
+                tasker();
         }
 
         function onmsg(d) {
diff --git a/copyparty/web/util.js b/copyparty/web/util.js
index 3cae49ef..c6103459 100644
--- a/copyparty/web/util.js
+++ b/copyparty/web/util.js
@@ -112,12 +112,13 @@ if ((document.location + '').indexOf(',rej,') + 1)
 
 try {
     console.hist = [];
+    var CMAXHIST = 100;
     var hook = function (t) {
         var orig = console[t].bind(console),
             cfun = function () {
                 console.hist.push(Date.now() + ' ' + t + ': ' + Array.from(arguments).join(', '));
-                if (console.hist.length > 100)
-                    console.hist = console.hist.slice(50);
+                if (console.hist.length > CMAXHIST)
+                    console.hist = console.hist.slice(CMAXHIST / 2);
 
                 orig.apply(console, arguments);
             };