diff --git a/fuzzers/FRET/benchmark/Snakefile b/fuzzers/FRET/benchmark/Snakefile
index cf8141c864..a9ccedd957 100644
--- a/fuzzers/FRET/benchmark/Snakefile
+++ b/fuzzers/FRET/benchmark/Snakefile
@@ -1,6 +1,6 @@
 import csv
 import os
-def_flags="--no-default-features --features std,snapshot_fast,restarting,do_hash_notify_state,trace_job_response_times,fuzz_int,shortcut"
+def_flags="--release --no-default-features --features std,snapshot_fast,restarting,do_hash_notify_state,trace_job_response_times,fuzz_int,shortcut"
 remote="remote/"
 RUNTIME=1800
 TARGET_REPS_A=2
@@ -12,77 +12,110 @@ NODE_ID= 0 if os.getenv('NODE_ID') == None else int(os.environ['NODE_ID'])
 MY_RANGE_A=range(NODE_ID*REP_PER_NODE_A,(NODE_ID+1)*REP_PER_NODE_A)
 MY_RANGE_B=range(NODE_ID*REP_PER_NODE_B,(NODE_ID+1)*REP_PER_NODE_B)
 
+rule build_default:
+    input:
+        "../Cargo.toml",
+        "../src"
+    output:
+        directory("bins/target_default")
+    shell:
+        "cargo build --target-dir {output} {def_flags}"
+
 rule build_showmap:
+    input:
+        "bins/target_default"
     output:
         directory("bins/target_showmap")
     shell:
-        "cargo build --target-dir {output} {def_flags},config_stg"
+        "cp -r -a --reflink=auto {input} {output} && cargo build --target-dir {output} {def_flags},config_stg"
 
 rule build_random:
+    input:
+        "bins/target_default"
     output:
         directory("bins/target_random")
     shell:
-        "cargo build --target-dir {output} {def_flags},feed_longest"
+        "cp -r -a --reflink=auto {input} {output} && cargo build --target-dir {output} {def_flags},feed_longest"
 
 rule build_frafl:
+    input:
+        "bins/target_default"
     output:
         directory("bins/target_frafl")
     shell:
-        "cargo build --target-dir {output} {def_flags},config_frafl,feed_longest"
+        "cp -r -a --reflink=auto {input} {output} && cargo build --target-dir {output} {def_flags},config_frafl,feed_longest"
 
 rule build_afl:
+    input:
+        "bins/target_default"
     output:
         directory("bins/target_afl")
     shell:
-        "cargo build --target-dir {output} {def_flags},config_afl,observer_hitcounts"
+        "cp -r -a --reflink=auto {input} {output} && cargo build --target-dir {output} {def_flags},config_afl,observer_hitcounts"
 
 rule build_stg:
+    input:
+        "bins/target_default"
     output:
         directory("bins/target_stg")
     shell:
-        "cargo build --target-dir {output} {def_flags},config_stg"
+        "cp -r -a --reflink=auto {input} {output} && cargo build --target-dir {output} {def_flags},config_stg"
 
 rule build_stgpath:
+    input:
+        "bins/target_default"
     output:
         directory("bins/target_stgpath")
     shell:
-        "cargo build --target-dir {output} {def_flags},feed_stg_abbhash,sched_stg_abbhash,mutate_stg"
+        "cp -r -a --reflink=auto {input} {output} && cargo build --target-dir {output} {def_flags},feed_stg_abbhash,sched_stg_abbhash,mutate_stg"
 
 rule build_feedgeneration1:
+    input:
+        "bins/target_default"
     output:
         directory("bins/target_feedgeneration1")
     shell:
-        "cargo build --target-dir {output} {def_flags},feed_genetic,gensize_1"
+        "cp -r -a --reflink=auto {input} {output} && cargo build --target-dir {output} {def_flags},feed_genetic,gensize_1"
 
 rule build_feedgeneration10:
+    input:
+        "bins/target_default"
     output:
         directory("bins/target_feedgeneration10")
     shell:
-        "cargo build --target-dir {output} {def_flags},feed_genetic,gensize_10"
+        "cp -r -a --reflink=auto {input} {output} && cargo build --target-dir {output} {def_flags},feed_genetic,gensize_10"
 
 rule build_feedgeneration100:
+    input:
+        "bins/target_default"
     output:
         directory("bins/target_feedgeneration100")
     shell:
-        "cargo build --target-dir {output} {def_flags},config_genetic,gensize_100"
+        "cp -r -a --reflink=auto {input} {output} && cargo build --target-dir {output} {def_flags},config_genetic,gensize_100"
 
 rule build_genetic100:
+    input:
+        "bins/target_default"
     output:
         directory("bins/target_genetic100")
     shell:
-        "cargo build --target-dir {output} {def_flags},config_genetic,mutate_stg,gensize_100"
+        "cp -r -a --reflink=auto {input} {output} && cargo build --target-dir {output} {def_flags},config_genetic,mutate_stg,gensize_100"
 
 rule build_feedgeneration1000:
+    input:
+        "bins/target_default"
     output:
         directory("bins/target_feedgeneration1000")
     shell:
-        "cargo build --target-dir {output} {def_flags},config_genetic,gensize_1000"
+        "cp -r -a --reflink=auto {input} {output} && cargo build --target-dir {output} {def_flags},config_genetic,gensize_1000"
 
 rule build_genetic1000:
+    input:
+        "bins/target_default"
     output:
         directory("bins/target_genetic1000")
     shell:
-        "cargo build --target-dir {output} {def_flags},config_genetic,mutate_stg,gensize_1000"
+        "cp -r -a --reflink=auto {input} {output} && cargo build --target-dir {output} {def_flags},config_genetic,mutate_stg,gensize_1000"
 
 rule run_bench:
     input:
@@ -107,8 +140,8 @@ rule run_bench:
                     export RUST_BACKTRACE=1
                     mkdir -p $(dirname {output[0]})
                     set +e
-                    echo $(pwd)/{input[1]}/debug/fret -n $(pwd)/timedump/{wildcards.fuzzer}/{wildcards.target}#{wildcards.num} -s {select_task} -t -a -g -k {input[0]} -c ./target_symbols.csv fuzz --random -t {RUNTIME} -s {wildcards.num}
-                    $(pwd)/{input[1]}/debug/fret -n $(pwd)/timedump/{wildcards.fuzzer}/{wildcards.target}#{wildcards.num} -s {select_task} -t -a -g -k {input[0]} -c ./target_symbols.csv fuzz --random -t {RUNTIME} -s {wildcards.num} > {output[1]} 2>&1
+                    echo $(pwd)/{input[1]}/release/fret -n $(pwd)/timedump/{wildcards.fuzzer}/{wildcards.target}#{wildcards.num} -s {select_task} -t -a -g -k {input[0]} -c ./target_symbols.csv fuzz --random -t {RUNTIME} -s {wildcards.num}
+                    $(pwd)/{input[1]}/release/fret -n $(pwd)/timedump/{wildcards.fuzzer}/{wildcards.target}#{wildcards.num} -s {select_task} -t -a -g -k {input[0]} -c ./target_symbols.csv fuzz --random -t {RUNTIME} -s {wildcards.num} > {output[1]} 2>&1
                     exit 0
                     """
             else:
@@ -116,8 +149,8 @@ rule run_bench:
                     export RUST_BACKTRACE=1
                     mkdir -p $(dirname {output[0]})
                     set +e
-                    echo $(pwd)/{input[1]}/debug/fret -n $(pwd)/timedump/{wildcards.fuzzer}/{wildcards.target}#{wildcards.num} -s {select_task} -t -a -g -k {input[0]} -c ./target_symbols.csv fuzz -t {RUNTIME} -s {wildcards.num}
-                    $(pwd)/{input[1]}/debug/fret -n $(pwd)/timedump/{wildcards.fuzzer}/{wildcards.target}#{wildcards.num} -s {select_task} -t -a -g -k {input[0]} -c ./target_symbols.csv fuzz -t {RUNTIME} -s {wildcards.num} > {output[1]} 2>&1
+                    echo $(pwd)/{input[1]}/release/fret -n $(pwd)/timedump/{wildcards.fuzzer}/{wildcards.target}#{wildcards.num} -s {select_task} -t -a -g -k {input[0]} -c ./target_symbols.csv fuzz -t {RUNTIME} -s {wildcards.num}
+                    $(pwd)/{input[1]}/release/fret -n $(pwd)/timedump/{wildcards.fuzzer}/{wildcards.target}#{wildcards.num} -s {select_task} -t -a -g -k {input[0]} -c ./target_symbols.csv fuzz -t {RUNTIME} -s {wildcards.num} > {output[1]} 2>&1
                     exit 0
                     """
             shell(script)
@@ -143,7 +176,7 @@ rule run_showmap:
             bkp=line['return_function']
             select_task=line['select_task']
             script="""
-                export FUZZER=$(pwd)/{input[1]}/debug/fret
+                export FUZZER=$(pwd)/{input[1]}/release/fret
                 mkdir -p $(dirname {output})
                 set +e
                 echo $FUZZER -n $(pwd)/{remote}/timedump/{wildcards.fuzzer}/{wildcards.target}#{wildcards.num}_case -s {select_task} -t -a -r -g -k {input[0]} -c ./target_symbols.csv showmap -i {input[2]}