Compacting pool header to 8 bytes. Replaced typed pool chunks with fixed-size untyped ones. loop_arithmetics_1kk.js benchmark: 2.98517 -> 2.9443.

src/liballocator/mem-allocator.c

@@ -18,6 +18,7 @@
  */
 
 #include "globals.h"
+#include "jerry-libc.h"
 #include "mem-allocator.h"
 #include "mem-heap.h"
 #include "mem-poolman.h"
@@ -54,6 +55,25 @@ mem_finalize( bool is_show_mem_stats) /**< show heap memory stats
   if (is_show_mem_stats)
     {
       mem_heap_print( false, false, true);
+
+#ifdef MEM_STATS
+      mem_pools_stats_t stats;
+      mem_pools_get_stats( &stats);
+
+      __printf("Pools stats:\n");
+      __printf(" Chunk size: %u\n"
+               "  Pools: %lu\n"
+               "  Allocated chunks: %lu\n"
+               "  Free chunks: %lu\n"
+               "  Peak pools: %lu\n"
+               "  Peak allocated chunks: %lu\n\n",
+               MEM_POOL_CHUNK_SIZE,
+               stats.pools_count,
+               stats.allocated_chunks,
+               stats.free_chunks,
+               stats.peak_pools_count,
+               stats.peak_allocated_chunks);
+#endif /* MEM_STATS */
     }
 
   mem_heap_finalize();
@@ -62,8 +82,46 @@ mem_finalize( bool is_show_mem_stats) /**< show heap memory stats
 /**
  * Get base pointer for allocation area.
  */
-uintptr_t
+static uintptr_t
 mem_get_base_pointer( void)
 {
   return (uintptr_t) mem_heap_area;
 } /* mem_get_base_pointer */
+
+/**
+ * Compress pointer.
+ */
+uintptr_t
+mem_compress_pointer(void *pointer) /**< pointer to compress */
+{
+    JERRY_ASSERT( pointer != NULL );
+
+    uintptr_t int_ptr = (uintptr_t) pointer;
+
+    JERRY_ASSERT(int_ptr % MEM_ALIGNMENT == 0);
+
+    int_ptr -= mem_get_base_pointer();
+    int_ptr >>= MEM_ALIGNMENT_LOG;
+
+    JERRY_ASSERT((int_ptr & ~((1u << MEM_HEAP_OFFSET_LOG) - 1)) == 0);
+
+    JERRY_ASSERT( int_ptr != MEM_COMPRESSED_POINTER_NULL );
+
+    return int_ptr;
+} /* mem_compress_pointer */
+
+/**
+ * Decompress pointer.
+ */
+void*
+mem_decompress_pointer(uintptr_t compressed_pointer) /**< pointer to decompress */
+{
+    JERRY_ASSERT( compressed_pointer != MEM_COMPRESSED_POINTER_NULL );
+
+    uintptr_t int_ptr = compressed_pointer;
+
+    int_ptr <<= MEM_ALIGNMENT_LOG;
+    int_ptr += mem_get_base_pointer();
+
+    return (void*) int_ptr;
+} /* mem_decompress_pointer */