diff --git a/Kernel/Process.cpp b/Kernel/Process.cpp
index 4889335e9b..7390085369 100644
--- a/Kernel/Process.cpp
+++ b/Kernel/Process.cpp
@@ -52,6 +52,7 @@ Vector<pid_t> Process::all_pids()
 {
     Vector<pid_t> pids;
     InterruptDisabler disabler;
+    pids.ensure_capacity(g_processes->size_slow());
     for (auto* process = g_processes->head(); process; process = process->next())
         pids.append(process->pid());
     return pids;
@@ -61,6 +62,7 @@ Vector<Process*> Process::all_processes()
 {
     Vector<Process*> processes;
     InterruptDisabler disabler;
+    processes.ensure_capacity(g_processes->size_slow());
     for (auto* process = g_processes->head(); process; process = process->next())
         processes.append(process);
     return processes;