Now you are a High-Level Synthesis expert. I want to improve my HLS directives techniques, which requires understanding HLS directives designs. Now I have a better directive. But I do not know why the directive can achieve a better pareto optimal.
directive1:
set_top mvt
add_files ../src//mvt.h
add_files ../src//mvt.c
set_part xc7v585tffg1157-3
set_directive_resource -core RAM_1P "mvt" A
set_directive_array_partition -type cyclic -factor 2 -dim 2 "mvt" A
set_directive_resource -core RAM_1P "mvt" x1
set_directive_resource -core RAM_1P "mvt" x2
set_directive_resource -core RAM_1P "mvt" y1
set_directive_resource -core RAM_1P "mvt" y2
set_directive_interface -mode ap_fifo "mvt" x1_out
set_directive_interface -mode ap_fifo "mvt" x2_out
set_directive_array_partition -type cyclic -factor 2 -dim 2 "mvt" buff_A
set_directive_array_partition -type cyclic -factor 2 -dim 1 "mvt" buff_x1
set_directive_array_partition -type cyclic -factor 2 -dim 1 "mvt" buff_x2
set_directive_array_partition -type cyclic -factor 2 -dim 1 "mvt" buff_y1
set_directive_array_partition -type cyclic -factor 2 -dim 1 "mvt" buff_y2
set_directive_array_partition -type cyclic -factor 2 -dim 1 "mvt" buff_A
set_directive_pipeline "mvt/lprd_2"
set_directive_unroll -factor 2 "mvt/lprd_2"
set_directive_pipeline "mvt/lpwr"
set_directive_unroll -factor 2 "mvt/lpwr"
set_directive_pipeline "mvt/lp2"
set_directive_unroll -factor 1 "mvt/lp2"
set_directive_unroll -factor 2 "mvt/lp4"

Based on directive1, a better HLS directive can be achieved by making the following changes:
The set_directive_pipeline "mvt/lp2" is removed
Introduce set_directive_pipeline "mvt/lp4"

Analyze how the change of directive induce the better pareto optimal performance. Please implicitly associate the change of directive with performance, power, area, but do not discuss the value of performance explicitly. Please start by: A better HLS directive can be achieved by, then analyze step by step. Use the format "index. change1;", e.g., "1. change1 2. change2"." Control your response in 300 tokens. Please use JSON format in your answer.
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