diff --git a/vlib/v/builder/cbuilder/parallel_cc.v b/vlib/v/builder/cbuilder/parallel_cc.v
index 61c3b32f05..b7764979f9 100644
--- a/vlib/v/builder/cbuilder/parallel_cc.v
+++ b/vlib/v/builder/cbuilder/parallel_cc.v
@@ -5,10 +5,11 @@ import time
 import sync
 import v.util
 import v.builder
+import sync.pool
 
 fn parallel_cc(mut b builder.Builder, header string, res string, out_str string, out_fn_start_pos []int) {
-	nr_jobs := util.nr_jobs
-	println('len=$nr_jobs')
+	c_files := util.nr_jobs
+	println('> c_files: $c_files | util.nr_jobs: $util.nr_jobs')
 	out_h := header.replace_once('static char * v_typeof_interface_IError', 'char * v_typeof_interface_IError')
 	os.write_file('out.h', out_h) or { panic(err) }
 	// Write generated stuff in `g.out` before and after the `out_fn_start_pos` locations,
@@ -21,9 +22,9 @@ fn parallel_cc(mut b builder.Builder, header string, res string, out_str string,
 	}
 
 	mut prev_fn_pos := 0
-	mut out_files := []os.File{len: nr_jobs}
+	mut out_files := []os.File{len: c_files}
 	mut fnames := []string{}
-	for i in 0 .. nr_jobs {
+	for i in 0 .. c_files {
 		fname := 'out_${i + 1}.c'
 		fnames << fname
 		out_files[i] = os.create(fname) or { panic(err) }
@@ -32,7 +33,7 @@ fn parallel_cc(mut b builder.Builder, header string, res string, out_str string,
 	// out_fn_start_pos.sort()
 	for i, fn_pos in out_fn_start_pos {
 		if prev_fn_pos >= out_str.len || fn_pos >= out_str.len || prev_fn_pos > fn_pos {
-			println('EXITING i=$i out of $out_fn_start_pos.len prev_pos=$prev_fn_pos fn_pos=$fn_pos')
+			println('> EXITING i=$i out of $out_fn_start_pos.len prev_pos=$prev_fn_pos fn_pos=$fn_pos')
 			break
 		}
 		if i == 0 {
@@ -41,42 +42,50 @@ fn parallel_cc(mut b builder.Builder, header string, res string, out_str string,
 			continue
 		}
 		fn_text := out_str[prev_fn_pos..fn_pos]
-		out_files[i % nr_jobs].writeln(fn_text + '\n//////////////////////////////////////\n\n') or {
+		out_files[i % c_files].writeln(fn_text + '\n//////////////////////////////////////\n\n') or {
 			panic(err)
 		}
 		prev_fn_pos = fn_pos
 	}
-	for i in 0 .. nr_jobs {
+	for i in 0 .. c_files {
 		out_files[i].close()
 	}
-	t := time.now()
-	mut wg := sync.new_waitgroup()
+	//
+	sw := time.new_stopwatch()
+	mut o_postfixes := []string{}
 	for i in ['0', 'x'] {
-		wg.add(1)
-		go build_o(i, mut wg)
+		o_postfixes << i
 	}
-	for i in 0 .. nr_jobs {
-		wg.add(1)
-		go build_o((i + 1).str(), mut wg)
+	for i in 0 .. c_files {
+		o_postfixes << (i + 1).str()
 	}
-	wg.wait()
-	println(time.now() - t)
-	link_cmd := '${os.quoted_path(cbuilder.cc_compiler)} -o v_parallel out_0.o ${fnames.map(it.replace('.c',
+	mut pp := pool.new_pool_processor(callback: build_o_cb)
+	nthreads := c_files + 2
+	pp.set_max_jobs(nthreads)
+	pp.work_on_items(o_postfixes)
+	eprintln('> C compilation on $nthreads threads, working on $o_postfixes.len files took: $sw.elapsed().milliseconds() ms')
+	dump(b.pref.out_name)
+	link_cmd := '${os.quoted_path(cbuilder.cc_compiler)} -o ${os.quoted_path(b.pref.out_name)} out_0.o ${fnames.map(it.replace('.c',
 		'.o')).join(' ')} out_x.o -lpthread $cbuilder.cc_ldflags'
+	sw_link := time.new_stopwatch()
 	link_res := os.execute(link_cmd)
-	println('> link_cmd: $link_cmd => $link_res.exit_code')
-	println(time.now() - t)
-	if link_res.exit_code != 0 {
-		println(link_res.output)
-	}
+	eprint_time('link_cmd', link_cmd, link_res, sw_link)
 }
 
-fn build_o(postfix string, mut wg sync.WaitGroup) {
+fn build_o_cb(p &pool.PoolProcessor, idx int, wid int) voidptr {
+	postfix := p.get_item<string>(idx)
 	sw := time.new_stopwatch()
 	cmd := '${os.quoted_path(cbuilder.cc_compiler)} $cbuilder.cc_cflags -c -w -o out_${postfix}.o out_${postfix}.c'
 	res := os.execute(cmd)
-	wg.done()
-	println('cmd: `$cmd` => $res.exit_code , $sw.elapsed().milliseconds() ms')
+	eprint_time('c cmd', cmd, res, sw)
+	return unsafe { nil }
+}
+
+fn eprint_time(label string, cmd string, res os.Result, sw time.StopWatch) {
+	eprintln('> $label: `$cmd` => $res.exit_code , $sw.elapsed().milliseconds() ms')
+	if res.exit_code != 0 {
+		eprintln(res.output)
+	}
 }
 
 const cc_compiler = os.getenv_opt('CC') or { 'cc' }