Replicant

I manage to compile it without swapping with 12G with the following:

$ sudo pacman -S systemd-swap
$ cat /etc/systemd/swap.conf
################################################################################
# Defaults are optimized for general usage
################################################################################

################################################################################
# You can override any settings by files in:
# /etc/systemd/swap.conf.d/*.conf
################################################################################

################################################################################
# Zswap
#
# Kernel >= 3.11
# Zswap create compress cache between swap and memory for reduce IO
# https://www.kernel.org/doc/Documentation/vm/zswap.txt

zswap_enabled=1
zswap_compressor=lz4      # lzo lz4
zswap_max_pool_percent=50 # 1-99
zswap_zpool=zbud          # zbud z3fold

################################################################################
# ZRam
#
# Kernel >= 3.15
# Zram compression streams count for additional information see:
# https://www.kernel.org/doc/Documentation/blockdev/zram.txt

zram_enabled=0
zram_size=$(($RAM_SIZE/4))      # This is 1/4 of ram size by default.
zram_streams=$NCPU
zram_alg=lz4                    # lzo lz4 deflate lz4hc 842 - for Linux 4.8.4
zram_prio=32767                 # 1 - 32767

################################################################################
# Swap File Chunked
# Allocate swap files dynamically
# For btrfs fallback to swapfile + loop will be used
# ex. Min swap size 512M, Max 8*512M
swapfc_enabled=0
swapfc_force_use_loop=0     # Force usage of swapfile + loop
swapfc_frequency=1s         # How often check free swap space
swapfc_chunk_size=512M      # Allocate size of swap chunk
swapfc_max_count=8          # 0 - unlimited, note: 32 is a kernel maximum
swapfc_free_swap_perc=15    # Add new chunk if free < 15%
                            # Remove chunk if free > 15+40% & chunk count > 2
swapfc_path=/var/lib/systemd-swap/swapfc/
# Only for swapfile + loop
swapfc_nocow=1              # Disable CoW on swapfile
swapfc_directio=1           # Use directio for loop dev
swapfc_force_preallocated=0 # Will preallocate created files

################################################################################
# Swap devices
# Find and auto swapon all available swap devices
swapd_auto_swapon=1
swapd_prio=1024