diff --git a/src/process.cpp b/src/process.cpp
index 2342d30..6cdcf54 100644
--- a/src/process.cpp
+++ b/src/process.cpp
@@ -350,19 +350,16 @@ bool IsValid(Process *process) {
         return false;
     }
 
-    int status = 0;
-    pollfd p = {};
-    p.fd = plat->child_stdout_read;
-    p.events = POLLRDHUP | POLLERR | POLLHUP | POLLNVAL;
-    int res = poll(&p, 1, 0);
-    if (res > 0) {
-        pid_t result = waitpid(plat->pid, &status, 0);
-        Assert(result != -1);
-        process->exit_code = WEXITSTATUS(status);
-        return false;
+    int   status = 0;
+    pid_t result = waitpid(plat->pid, &status, WNOHANG);
+    if (result == 0) {
+        return true;
     }
 
-    return true;
+    Assert(result != -1);
+    process->exit_code = WIFEXITED(status) ? WEXITSTATUS(status) : -1;
+    process->is_valid  = false;
+    return false;
 }
 
 void KillProcess(Process *process) {
@@ -384,7 +381,7 @@ String PollStdout(Allocator allocator, Process *process, bool force_read) {
     p.events = POLLIN;
     int res = poll(&p, 1, 0);
     if (res > 0 || force_read) {
-        result.len = read(plat->child_stdout_read, result.data, 4 * 4096);
+        result.len = read(plat->child_stdout_read, result.data, 16 * 4096);
     }
     return result;
 }
@@ -471,10 +468,9 @@ void UpdateProcesses() {
         View *view = GetView(it.args.output_view);
 
         String poll = PollStdout(scratch, &it, false);
-        if (poll.len) {
+        if (poll.len > 0) {
             Append(view, poll, it.args.scroll_to_end);
-        }
-        if (!IsValid(&it)) {
+        } else if (!IsValid(&it)) {
             ReportConsolef("process %lld exit code = %d", it.id, it.exit_code);
             remove_item = true;
         }