Добавлен pool со списками занятых/незанятых, в 6 раз быстрее std::vector.push_back() и в 3 раза быстрее malloc

c/malloc_speed_test/pool_list.c

@@ -0,0 +1,126 @@
+#include <stdlib.h>
+
+#include <stdio.h>
+
+#define MAX_I 0x00ffffff
+
+#define bool char
+#define TRUE 1
+#define FALSE 0
+
+struct object_s {
+    char val;
+};
+
+struct block_s {
+    struct block_s *next;
+    struct block_s *prev;
+    struct object_s obj;
+};
+
+struct block_s pool[MAX_I];
+
+struct block_s *free_pool = NULL,
+	       *busy_pool = NULL;
+
+/*
+ * инициализация пула
+ */
+void init()
+{
+	size_t i;
+
+	size_t max_i = MAX_I - 1;
+	for (i = 1; i < max_i; i++) {
+		pool[i].prev = &pool[i - 1];
+		pool[i].next = &pool[i + 1];
+	}
+
+	pool[0].prev = NULL;
+	pool[0].next = &pool[1];
+
+	pool[MAX_I - 1].prev = &pool[MAX_I - 2];
+	pool[MAX_I - 1].next = NULL;
+
+	free_pool = &pool[0];
+	busy_pool = NULL;
+}
+
+#define MAX_B (pool + MAX_I * sizeof(struct block_s))
+
+inline void *alloc()
+{
+	if (!free_pool)
+		return NULL;
+
+	struct block_s *f1 = free_pool,
+	               *f2 = free_pool->next,
+		       *b1 = busy_pool;
+
+	// move one free block to busy list
+
+	// f1, b1
+	if (b1) {
+		f1->next = b1;
+		b1->prev = f1;
+	}
+	else
+		f1->next = NULL;
+
+	// f2
+	if (f2)
+		f2->prev = NULL;
+	
+	// free_pool
+	free_pool = f2;
+
+	// busy_pool
+	busy_pool = f1;
+
+
+	return &f1->obj;
+}
+
+inline void free(void *p)
+{
+	struct block_s *b1 = (struct block_s *)(p - 2 * sizeof(struct block_s *)),
+	               *b0 = b1->prev,
+		       *b2 = b1->next,
+		       *f1 = free_pool;
+
+	// move one busy block to free list
+
+	// cut block from free list
+	if (b0)
+		b0->next = b2;
+	if (b2)
+		b2->prev = b0;
+
+	// f1, b1
+	if (f1) {
+		b1->next = f1;
+		f1->prev = b1;
+	}
+	else
+		b1->next = NULL;
+
+	// free_pool
+	free_pool = b2;
+
+	// busy_pool
+	if (busy_pool == b1)
+		busy_pool = b2;
+}
+
+int main()
+{
+	unsigned long long i;
+
+	init();
+	
+	for (i = 0; i < MAX_I; i++)
+		alloc();
+
+	return 0;
+}
+

c/malloc_speed_test/run.sh

@@ -1,10 +1,13 @@
 #!/bin/bash
 
-echo "malloc_speed_test.c test:"
+echo -e "\n\nmalloc_speed_test.c test:"
 cc -O2 malloc_speed_test.c -o malloc_speed_test && time ./malloc_speed_test
 
 echo -e "\n\nvector_add.cpp test:"
 c++ -O2 vector_add.cpp -o vector_add && time ./vector_add
 
-echo "pool1.c test:"
+echo -e "\n\npool1.c test:"
 cc -O2 pool1.c -o pool1 && time ./pool1
+
+echo -e "\n\npool_list.c test:"
+cc -O2 pool_list.c -o pool_list && time ./pool_list