Nothing
## ---- include = FALSE---------------------------------------------------------
knitr::opts_chunk$set(
message = FALSE,
warning = FALSE,
collapse = TRUE,
comment = "#>",
out.width = "100%"
)
## ---- eval = TRUE-------------------------------------------------------------
library(dispositionEffect)
library(dplyr)
library(foreach)
library(parallel)
library(doParallel)
library(future)
library(furrr)
library(bench)
## ---- eval=TRUE---------------------------------------------------------------
portfolio_compute_parallel <- function(portfolio_transactions, market_prices, plan = NULL, ...) {
investors_id <- purrr::map_chr(portfolio_transactions, ~purrr::pluck(., "investor")[1])
portfolio_compute_safe <- purrr::safely(portfolio_compute)
if (is.null(plan)) {
ncores <- future::availableCores()
# if there are more than 2 cores than use parallel computing
# otherwise use sequential computing
# RULE: be polite, always leave at least 1 free core
if ((ncores - 1) > 1) {
new_plan <- "multisession" # since I am testing on Windows
} else {
new_plan <- "sequential"
}
} else {
new_plan <- plan
}
old_plan <- future::plan(strategy = new_plan)
res <- furrr::future_map(
portfolio_transactions,
portfolio_compute_safe,
market_prices,
...)
res <- purrr::transpose(res)$result
names(res) <- investors_id
future::plan(old_plan) # set back the old plan
return(res)
}
## ---- eval=TRUE---------------------------------------------------------------
trx <- DEanalysis$transactions %>%
dplyr::group_by(investor) %>%
dplyr::group_split()
mkt <- DEanalysis$marketprices
## ---- eval=FALSE--------------------------------------------------------------
# res <- bench::mark(
# "sequential" = portfolio_compute_parallel(trx, mkt, plan = "sequential"),
# "parallel" = portfolio_compute_parallel(trx, mkt, plan = "multisession")
# )
#
# res$expression <- c("sequential", "parallel")
# res[, 1:8]
## ---- echo=FALSE, fig.align='center'------------------------------------------
knitr::include_graphics("figures/de-parallel-bench1.PNG")
## ---- eval=FALSE--------------------------------------------------------------
# cl <- parallel::makeCluster(parallel::detectCores())
# doParallel::registerDoParallel(cl)
# foreach::foreach(i = seq_along(trx), .errorhandling = "pass") %dopar% {
#
# transactions <- dplyr::arrange(trx[[i]], datetime)
# mrkt_prices <- dplyr::filter(
# mkt,
# asset %in% unique(transactions$asset) &
# datetime <= max(transactions$datetime)
# )
# df <- dispositionEffect:::generate_data(transactions, mrkt_prices, subset = TRUE)
# nm <- paste0("INV", i, ".RData")
# save(df, file = nm)
#
# }
# parallel::stopCluster(cl)
## ---- eval=FALSE--------------------------------------------------------------
# portfolio_compute_onfiles <- function(files, plan = "sequential") {
#
# if (plan == "sequential") {
#
# res_list <- vector(mode = "list", length = length(files))
# for (i in seq_along(files)) {
# load(files[i]) # load the file
# tmp_res <- tryCatch(
# dispositionEffect::portfolio_compute(
# portfolio_transactions = df$transactions,
# market_prices = df$marketprices
# ),
# error = function(e) "Error"
# )
# res_list[[i]] <- tmp_res # save results
# rm(df, tmp_res)
# }
#
# } else {
#
# cl <- parallel::makeCluster(parallel::detectCores())
# doParallel::registerDoParallel(cl)
# res_list <-
# foreach(i = seq_along(files), .errorhandling = "pass") %dopar% {
# load(files[i]) # load the file
# tmp_res <- tryCatch(
# dispositionEffect::portfolio_compute(
# portfolio_transactions = df$transactions,
# market_prices = df$marketprices
# ),
# error = function(e) "Error"
# )
# }
# parallel::stopCluster(cl)
#
# }
#
# return(res_list)
#
# }
## ---- eval=FALSE--------------------------------------------------------------
# files <- list.files(pattern = ".RData") # list all single .RData
#
# res <- bench::mark(
# portfolio_compute_onfiles(files, plan = "sequential"),
# portfolio_compute_onfiles(files, plan = "multisession")
# )
#
# res$expression <- c("sequential", "parallel")
# res[, 1:8]
## ---- echo=FALSE, fig.align='center'------------------------------------------
knitr::include_graphics("figures/de-parallel-bench2.PNG")
## ---- eval=TRUE, echo=FALSE---------------------------------------------------
# system('systeminfo')
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